PinoyBIX Engineering Problem Solving and Reference

251. 70 V

252. Air

253. Anticapacitance switch

254. Bifilar resistor

255. Alloy

256. Peak

257. Increases two times

258. Decreases or increases

259. Maximum

260. Receives energy

261. Eliminating the j component in the denominator

262. Quadrature component only

263. 0

264. 5

265. 10

266. Increased

267. Distance between plates

268. Appliances have different current ratings

269. V/m

270. Triangular wave

271. Because frequency of dc is zero

272. Greater than the largest capacitor

273. Reactance

274. Voltage

275. ½ L and 2 A

276. Reactive power

277. 50 %

278. Exponential law

279. Current

280. 2 μF

281. Lagging

282. Less than the smallest resistance in the connection

283. Large self-induced voltage across L

284. Phasor

285. Mass

286. Electrolytic

287. Electronic system

288. Shorting the load terminals

289. RL = r

290. 110 V

291. Smaller than the smallest capacitor

292. Thevenin’s theorem

293. Figure of merit

294. CV²/2

295. Norton’s theorem

296. Electrolytic

297. 30 W

298. Ohm’s law

299. Cryogenic conductor

300. Non-linear circuit

Online Questions and Answers Series

Complete List of MCQs in Electronics Engineering per topic

---

This is the Multiples Choice Questions Part 6 of the Series in Electrical Circuit as one of the Electronics Engineering topic. In Preparation for the ECE Board Exam make sure to expose yourself and familiarize in each and every questions compiled here taken from various sources including but not limited to past Board Exam Questions in Electronics Engineering field, Electronics Books, Journals and other Electronics References.

Online Questions and Answers Topic Outline

• MCQs in AC-DC circuits
• MCQs in Resistors
• MCQs in Inductors
• MCQs in Capacitors

The Series

Continue Practice Exam Test Questions Part 6 of the Series

• A. 70 V
• B. 80 V
• C. 90 V
• D. 100 V

252. What dielectric is generally employed by a variable capacitor?

• A. Mica
• B. Air
• C. Electrolyte
• D. Ceramic

• A. LOCAP switch
• B. AntiLOCAP switch
• C. Anticapacitance switch
• D. Capacitance switch

• A. Bifilar resistor
• B. Wire-wound resistor
• C. Anti-inductive resistor
• D. Bleeder resistor

• A. Mixture
• B. Compound
• C. Alloy
• D. Ionization

• A. Peak
• B. Average
• C. Rms
• D. Instantaneous

• A. Increases two times
• B. Increases four times
• C. Decreases two times
• D. Decreases four times

• A. Decreases
• B. Increases
• C. Decreases or increases
• D. Decreases, increases or remains the same

• A. Halfway between maximum and minimum
• B. Maximum
• C. Minimum
• D. Zero

260. In a circuit, a passive element is one which

• A. Supplies energy
• B. Receives energy
• C. Both supplies and receives energy
• D. Attenuates signal

261. Rationalizing the denominator of a complex number means

• A. Eliminating the j component in the denominator
• B. Adding j component in the denominator
• C. Eliminating the j component in the numerator
• D. Adding j component in the numerator

262. When two complex conjugates are subtracted, the result is a

• A. Quadrature component only
• B. Complex component
• C. In-phase component
• D. Real component

• A. 0
• B. I²X_L
• C. IX_L
• D. IX_L²

• A. 2.5
• B. 5
• C. 10
• D. 25

• A. 10
• B. 5
• C. 50
• D. 100

A. Increased
B. Decreased
C. Constant
D. Zero

• A. Number of plates
• B. Dielectric
• C. Distance between plates
• D. Plate area

• A. Greater electrical power saving
• B. Power loss is minimum
• C. Appliances have different current ratings
• D. All of the above

• A. V(m)²
• B. V(m)
• C. V/m²
• D. V/m

270. Which of the following is the peakiest?

• A. Square wave
• B. Sinusoidal wave
• C. Triangular wave
• D. Rectangular wave

• A. Because it is a simple circuit
• B. Because dc circuits require only resistance as load
• C. Because they do not exist in a dc circuit
• D. Because frequency of dc is zero

• A. Greater than the largest capacitor
• B. Smaller than the largest capacitor
• C. Smaller than the smallest capacitor
• D. Greater than the smallest capacitor

• A. Resistance
• B. Reactance
• C. Inductance
• D. Capacitance

• A. Current
• B. Voltage
• C. Both current and voltage
• D. Neither current nor voltage

• A. 2L and1/2 A
• B. Does not matter because the volume of copper remains the same
• C. L and A
• D. ½ L and 2 A

• A. Quality factor
• B. Power factor
• C. Power ratio
• D. Reactive power

• A. 50 %
• B. 100 %
• C. 25 %
• D. 75 %

• A. Linear law
• B. Hyperbolic law
• C. Inverse-square law
• D. Exponential law

279. Norton’s theorem is what form of an ac equivalent circuit?

• A. Voltage
• B. Current
• C. Both voltage and current
• D. Neither voltage nor current

• A. 200 μF
• B. 2 μF
• C. 100 μF
• D. 0.5 μF

281. An inductive load always has a ___ power factor

• A. Leading
• B. Lagging
• C. Zero
• D. Unity

• A. Less than the smallest resistance in the connection
• B. Greater than the smallest resistance in the connection
• C. Between the smallest and greatest resistance in the connection
• D. Increasing and decreasing depending upon the supply voltage

• A. Large self-induced voltage across L
• B. Long time constant
• C. Low resistance of the open switch
• D. Surge of resistance

• A. Polar diagram
• B. Scalar quantity
• C. Velocity
• D. Phasor

285. Which factor does not affect resistance?

• A. Length
• B. Resistivity
• C. Cross-sectional area
• D. Mass

286. Which of the following capacitors are used only in dc circuits?

• A. Mica
• B. Ceramic
• C. Mylar
• D. Electrolytic

287. The maximum power transfer theorem is used in

• A. Power system
• B. Electronic system
• C. Refrigeration
• D. Air conditioning

288. In Norton’s theorem, the short circuit current is obtained by

• A. Opening the load terminals
• B. Shorting the load terminals
• C. Opening the voltage source
• D. Shorting the voltage source

• A. R_L = 2 r
• B. R_L = 1.5 r
• C. R_L = r
• D. R_L = 3 r

• A. 220 V
• B. 150 V
• C. 110 V
• D. 22 V

• A. Smaller than the smallest capacitor
• B. Smaller than the largest capacitor
• C. Greater than any of the capacitor
• D. Greater than the largest capacitor

• A. Superposition theorem
• B. Millman’s theorem
• C. Thevenin’s theorem
• D. Norton’s theorem

• A. Figure of merit
• B. Figure of demerit
• C. Noise factor
• D. Noise figure

• A. CV²/2
• B. 2Q²/C
• C. C²/V
• D. CV

• A. Superposition theorem
• B. Millman’s theorem
• C. Thevenin’s theorem
• D. Norton’s theorem

296. Which of the following capacitors has the highest cost per μF?

• A. Plastic
• B. Air
• C. Mica
• D. Electrolytic

• A. 60 W
• B. 30 W
• C. 15 W
• D. 4 W

• A. Ohm’s law
• B. Coulomb’s law
• C. Kirchhoff’s first law
• D. Kirchhoff’s second law

299. Another term for superconductor.

• A. Generic conductor
• B. Ultraconductor
• C. Cryotron
• D. Cryogenic conductor

300. A circuit whose parameters change with voltage or current.

• A. Non-linear circuit
• B. Linear circuit
• C. Complex circuit
• D. Passive circuit

Complete List of MCQs in Electronics Engineering per topic

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201. Decreases two times

202. Power factor

203. Power absorbed is zero

204. 360

205. The voltage applied to the plate

206. To utilize electrical energy

207. Inductance

208. Edge effect

209. Increase by 4 C

210. Charge

211. Inversely proportional to

212. Resistance

213. It has reactance in radio-frequency circuits

214. Decreases

215. Frequency

216. Three-terminal

217. Tan θ

218. Depends on the factor 2 π

219. Skin effect

220. Zero

221. Ceramic

222. Temperature coefficient

223. By using multiplate construction

224. Do not change with voltage and current

225. Rms

226. One half

227. Parallel resonant circuit

228. Imaginary

229. Effects produced

230. A complex number

231. Carbon

232. Manganin

233. The current is zero in all the other resistances

234. The rate at which electrons pass a given point

235. 2.7 Ω to 22 MΩ

236. 22 Ω

237. Capacitive

238. The energy stored in the magnetic field of the coil is 10 times the energy wasted in its resistance

239. Equals its peak value

240. 0.577

241. Increased

242. 12 ms

243. Resistance

244. Air

245. Rectangular

246. Polar

247. R/Z

248. Directly proportional to

249. 9 capacitors will be in parallel

250. Ω²/V

Online Questions and Answers Series

Complete List of MCQs in Electronics Engineering per topic

---

This is the Multiples Choice Questions Part 5 of the Series in Electrical Circuit as one of the Electronics Engineering topic. In Preparation for the ECE Board Exam make sure to expose yourself and familiarize in each and every questions compiled here taken from various sources including but not limited to past Board Exam Questions in Electronics Engineering field, Electronics Books, Journals and other Electronics References.

Multiple Choice Questions Topic Outline

• MCQs in AC-DC circuits
• MCQs in Resistors
• MCQs in Inductors
• MCQs in Capacitors

The Series

Continue Practice Exam Test Questions Part 5 of the Series

201. The distance between the capacitor plates increases two times, then its capacitance

• A. Increases two times
• B. Increases four times
• C. Decreases two times
• D. Decreases four times

202. The ratio between the active power and the apparent power of a load in an ac circuit is called

• A. Quality factor
• B. Power factor
• C. Power ratio
• D. Power reactive

203. When the power factor of a circuit is zero,

• A. Power absorbed is maximum
• B. Power absorbed is minimum
• C. Power absorbed is zero
• D. The impedance is minimum

204. How many degrees of phase represents one full cycle?

• A. 360
• B. 180
• C. 270
• D. 90

205. Which of the following does not generally affect the value of a capacitor?

• A. The dielectric material used
• B. The surface area of the plates
• C. The thickness of the dielectric
• D. The voltage applied to the plate

206. What is the purpose of a load in an electric circuit?

• A. To increase the circuit current
• B. To decrease the circuit current
• C. To utilize electrical energy
• D. To make the circuit complete

207. The power factor of a certain circuit in which the voltage lags behind the current is 80 %. To increase the power to 100 %, it is necessary to add _____ to the circuit.

• A. Inductance
• B. Capacitance
• C. Resistance
• D. Impedance

208. Refers to the outward-curving distortion of the lines of force near the edges of two parallel metal plates that form a capacitor.

• A. Skin effect
• B. Night effect
• C. Edge effect
• D. Hall effect

209. If voltage across the plates of 2 F capacitor is increased by 4 V, then charge on the plates will

• A. Decrease by 2 C
• B. Increase by 2 C
• C. Decrease by 4 C
• D. Increase by 4 C

210. What does a capacitor store?

• A. Voltage
• B. Charge
• C. Current
• D. Power

211. The mutual inductance between two coils is _____ the reluctance of magnetic path.

• A. Directly proportional to
• B. Inversely proportional to
• C. Independent to
• D. Equal to

212. The result of rust in electrical (wire) connection is

• A. Inductance
• B. Conductance
• C. Impedance
• D. Resistance

213. Which of the following is a disadvantage of a wire-wound resistor?

• A. It has reactance in radio-frequency circuits
• B. It cannot handle much power
• C. It draws a large amount of current
• D. It cannot handle high voltage

214. The resistance of an insulator ___ when its temperature is increased.

• A. Decreases
• B. Remains the same
• C. Increases
• D. Varies

215. The wavelength of an alternating waveform depends upon the _____ of the variation.

• A. Period
• B. Number
• C. Frequency
• D. Amplitude

216. Delta to wye or wye to delta transformation technique is applied to a _____ network.

• A. One-terminal
• B. Two-terminal
• C. Three-terminal
• D. Complex

217. For greater accuracy, the value of phase angle θ should be determined from

• A. Cos θ
• B. Tan θ
• C. Sin θ
• D. Sec θ

218. Inductive reactance applies only to sine waves because it

• A. Increases with lower frequencies
• B. Increases with lower inductance
• C. Depends on the factor 2 π
• D. Decreases with higher frequencies

219. What increases the resistance of wire at high frequencies?

• A. Temperature
• B. Voltage
• C. Skin effect
• D. Insulation

220. An inductor carries 2 A dc. If its inductance is 100 μH, then what is its inductive reactance?

• A. Zero
• B. 1.3 kΩ
• C. 628 Ω
• D. -628 Ω

221. Barium-strontium titanite dielectric material is also called

• A. Ceramic
• B. Polyster
• C. Electrolytic
• D. Bakelite

222. In the 5-band method of capacitor color coding, the first band indicates

• A. Temperature coefficient
• B. Tolerance
• C. 1^st digit
• D. Capacitance value

223. What is the most convenient way of achieving large capacitance?

• A. By using multiplate construction
• B. By using air as dielectric
• C. By decreasing distance between plates
• D. By using dielectric of low permittivity

224. A linear circuit is one whose parameters

• A. Change with change in voltage
• B. Change with change in current
• C. Do not change with voltage and current
• D. Change with change in voltage and current

225. For a linear circuit, _____ voltage or current is used to calculate average power.

• A. Rms
• B. Peak
• C. Average
• D. Instantaneous

226. When two coils of identical reactance are in parallel without mutual inductance, the reactance of the combination is _____ the reactance of each coil.

• A. One half
• B. Twice
• C. Four times
• D. One fourth

227. Which of the following is also known as anti-resonant circuit?

• A. Parallel resonant circuit
• B. Series resonant circuit
• C. Tuned circuit
• D. Tank circuit

228. In a complex number 5 + j 10, 10 is called _____ part.

• A. Imaginary
• B. Real
• C. Conjugate
• D. Integer

229. The presence of an electric current is made known by

• A. Electric shock
• B. Effects produced
• C. Magnetic shock
• D. Flashing

230. The reciprocal of a complex number is

• A. A complex number
• B. A real number
• C. An imaginary number
• D. A whole number

231. Which of the following has negative temperature coefficient?

• A. Carbon
• B. Nickel
• C. Brass
• D. Constantan

232. Which of the following is a common material used in wire-wound resistors?

• A. Manganin
• B. Carbon
• C. Bronze
• D. German silver wire

233. If one resistance in a series connection is open, then

• A. The current is zero in all the other resistances
• B. The current is maximum in all the other resistances
• C. The voltage is zero across the open resistance
• D. The voltage is infinite across the open resistance

234. What determines the magnitude of electric current?

• A. The rate at which electrons are produced
• B. The type of material used
• C. The current carrying capacity of the circuit
• D. The rate at which electrons pass a given point

235. For a carbon composition resistor, typical resistance values range from

• A. 2.7 Ω to 22 MΩ
• B. 1000 Ω to 10000 Ω
• C. 10 Ω to 10 MΩ
• D. 2.7 Ω to 2.7 GΩ

236. A lead conductor has a resistance of 25 Ω at 0 ˚C. Determine its resistance at -30 ˚C.

• A. 22 Ω
• B. 24 Ω
• C. 12 Ω
• D. 11 Ω

237. An impedance given by 90 -45˚ is a/an _____ impedance.

• A. Inductive
• B. Conductive
• C. Resistive
• D. Capacitive

238. If a coil has a Q of 10, it means that

• A. The energy stored in the magnetic field of the coil is 10 times the energy wasted in its resistance
• B. The energy wasted in its resistance is 10 times the energy stored in the magnetic field of the coil
• C. It is a low Q coil
• D. It is a high Q coil

239. What is the rms value of a square wave?

• A. Equals its peak value
• B. Equals its peak-to-peak value
• C. Peak divided by square root of two
• D. Peak divided by pi

240. The rms value of a triangular or sawtooth waveform is _____ times its peak value.

• A. 0.577
• B. 0.500
• C. 0.25
• D. 0.707

241. In a multiple capacitor, the plate area is

• A. Increased
• B. The same
• C. Decreased
• D. Variable

242. What is the time constant for L of 240 mH in series with R of 20 Ω?

• A. 12 ms
• B. 4.8 s
• C. 83.3 s
• D. 12 s

243. In an ac circuit, the power dissipated as heat depends on

• A. Impedance
• B. Capacitive reactance
• C. Resistance
• D. Inductive reactance

244. Which of the following dielectric materials makes the lowest-capacitance capacitor?

• A. Paper
• B. Mica
• C. Air
• D. Electrolyte

245. In adding or subtracting phasor quantities, ____ form is the most convenient.

• A. Polar
• B. Rectangular
• C. Trigonometric
• D. Exponential

246. In dividing or multiplying phasor quantities, _____ form is used.

• A. Polar
• B. Rectangular
• C. Trigonometric
• D. Exponential

247. The power factor of a circuit is equal to

• A. RZ
• B. X_C/Z
• C. X_L/Z
• D. R/Z

248. The capacitance of a capacitor is _____ relative permittivity.

• A. Directly proportional to
• B. Inversely proportional to
• C. Equal to
• D. Inversely proportional to the square of

249. If a multiplate capacitor has 10 plates, each of area 10 cm², then

• A. 10 capacitors will be in parallel
• B. 10 capacitors will be in series
• C. 9 capacitors will be in parallel
• D. 9 capacitors will be in series

250. Of the equivalent combination of units, which one is not equal to watt?

• A. Ω²/V
• B. AV
• C. A²Ω
• D. J/s

Complete List of MCQs in Electronics Engineering per topic

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151. 3.7 K

152. By an axis opposite the XC axis

153. Inductive

154. Moving the coils apart

155. Exponential law

156. Current magnification factor

157. 55 Ω-cm

158. 0.05 x 10^-6 F

159. 25 μC

160. Sine waves

161. Twice

162. Electrolytes

163. Positive

164. Joules

165. Quadrupled

166. Negative

167. Breakdown voltage

168. Larger plate area and less distance between plates

169. 14.5 MHz

170. 0.577 times peak value

171. 3.6 Ω

172. Phasor quantity

173. Block dc current

174. Resistor

175. The second digit of the value

176. 47

177. The same value as a single resistor

178. 1/12

179. 19 kΩ; 2 %

180. Volts per meter

181. Number of plates less one (n – 1)

182. Conductors separated by a dielectric

183. 2.592 x 10⁵ C

184. Approaches zero

185. 0.0034

186. Passing a current proportional to the rate of change of voltage

187. Square wave

188. Electrolytic

189. 10 + j 5 Ω

190. Elastance

191. 4 Ω

192. Resonance curve

193. 0.125 μF

194. Reactance chart

195. Voltage

196. Voltage

197. Resistance and inductive reactance

198. Surge voltage

199. Provides more power

200. Paper

Online Questions and Answers Series

Following is the list of multiple choice questions in this brand new series:

Complete List of MCQs in Electronics Engineering per topic

---

This is the Multiples Choice Questions Part 4 of the Series in Electrical Circuit as one of the Electronics Engineering topic. In Preparation for the ECE Board Exam make sure to expose yourself and familiarize in each and every questions compiled here taken from various sources including but not limited to past Board Exam Questions in Electronics Engineering field, Electronics Books, Journals and other Electronics References.

Multiple Choice Questions Topic Outline

• MCQs in AC-DC circuits
• MCQs in Resistors
• MCQs in Inductors
• MCQs in Capacitors

The Series

Continue Practice Exam Test Questions Part 4 of the Series

151. Metal tin becomes superconductor at approximately

• A. 6 K
• B. 3.7 K
• C. 5 K
• D. 4.7 K

152. In a complex resistance-reactance plane, X_L is represented

• A. By an axis opposite the R axis
• B. By an axis perpendicular to the X_C axis
• C. By an axis opposite the X_C axis
• D. By an axis parallel to the R axis

153. When the net reactance in a series coil-capacitor circuit is zero at frequency f, the nature of its reactance of frequency 2f is

• A. Inductive
• B. Capacitive
• C. Resistive
• D. Infinite

154. Which of the following is a way of decreasing mutual inductance?

• A. Moving the coils closer
• B. Moving the coils apart
• C. Decreasing the number of turns of either coil
• D. Increasing the number of turns of either coil

155. The charging of a capacitor through a resistance obeys

• A. Exponential law
• B. Logarithmic law
• C. Linear law
• D. Square law

156. The Q-factor of a parallel resonant circuit is also known as

• A. Voltage magnification factor
• B. Current magnification factor
• C. Gain magnification factor
• D. Resonance magnification factor

157. What is the specific resistance of a pure silicon?

• A. 55 Ω-mm
• B. 55 Ω-m
• C. 55 Ω-cm
• D. 55 kΩ-m

158. A capacitance of 0.05 μF equals

• A. 0.05 x 10⁶ F
• B. 0.05 x 10^-6 F
• C. 0.05 x 10^-12 F
• D. 0.05 x 10¹² F

159. A 5 μF capacitor charge to 5V has a stored charge equal to

• A. 1 μc
• B. 5 μc
• C. 25 μC
• D. 200 μc

160. The factor 0.707 for converting peak to rms applies only to

• A. Square waves
• B. Triangle waves
• C. Sawtooth waves
• D. Sine waves

161. When two in-phase sine waves that have identical frequency and amplitude are added together, then the result is a sine wave with _____ the amplitude of either.

• A. Half
• B. Twice
• C. Four times
• D. One-fourth

162. Liquids that are good conductors because of ionization are called

• A. Electrolytic
• B. Bases
• C. Acid
• D. Electrolytes

163. Tungsten filament of bulbs has a hot resistance higher than its cold resistance due to its temperature coefficient which is

• A. Positive
• B. Negative
• C. Zero
• D. Infinite

164. A term used to express the amount of electrical energy stored in electrostatic field.

• A. Joules
• B. Coulombs
• C. Watts
• D. Electron-volt

165. With double the number of turns by the same length and area, the inductance is

• A. The same
• B. Doubled
• C. Quartered
• D. Quadrupled

166. The temperature coefficient of resistance of electrolytes is

• A. Negative
• B. Positive
• C. Zero
• D. Infinite

167. What refers to the lowest voltage across any insulator that can cause current flow?

• A. Conduction voltage
• B. Critical voltage
• C. Breakdown voltage
• D. Voltage capacity

168. Capacitance increase with

• A. Larger plate area and less distance between plates
• B. Larger plate area and greater distance between plates
• C. Smaller plate area and less distance between plates
• D. Higher values of applied voltage

169. What is the resonant frequency of a circuit when L of 3 microhenrys and C of 40 picofarads are in series?

• A. 14.5 kHz
• B. 145 MHz
• C. 14.5 MHz
• D. 145 kHz

170. For a triangular and sawtooth waveform the rms voltage or current equals

• A. 0.707 times peak value
• B. 0.577 times peak value
• C. 0.577 times average value
• D. 0.707 times rms value

171. If two resistances of 9 Ω and 6 Ω are connected in parallel, the total resistance is

• A. 54 Ω
• B. 0.3 Ω
• C. 15 Ω
• D. 3.6 Ω

172. Refers specifically to steady state values of quantities in ac circuits which are complex numbers.

• A. Domain
• B. Scalar quantity
• C. Vector quantity
• D. Phasor quantity

173. A capacitor is used to

• A. Block dc current
• B. Pass dc current
• C. Open voltage source
• D. Short the voltage source

174. The usual load of a dc circuit is a/an

• A. Resistor
• B. Capacitor
• C. Inductor
• D. Both inductor and capacitor

175. The second strip of an electronic resistor color-code represents

• A. The multiplier
• B. The second digit of the value
• C. The temperature
• D. The tolerance

176. Which of the following is a preferred resistor value?

• A. 520
• B. 47
• C. 43,000
• D. 54,321

177. A three-by-three, series-parallel matrix of resistors, all having the same ohmic value, would have a net resistance of

• A. One-third the value of a single resistor
• B. Three times the value of a single resistor
• C. The same value as a single resistor
• D. Nine times the value of a single resistor

178. In an ac wave, 30 degrees of phase is ______ of a cycle.

• A. ½
• B. 1/12
• C. 1/3
• D. 1/30

179. What is the value of a carbon composition resistor with the following color code: Brown, white, orange, red

• A. 190 Ω; 10 %
• B. 19 kΩ; 2 %
• C. 19 kΩ; 20 %
• D. 1.9 kΩ; 2 %

180. The electric field strength between capacitor plates has a unit of

• A. Volts per meter
• B. Volts per mil
• C. Amperes per meter
• D. Amperes per mil

181. For multi-plate capacitor, capacitance is proportional to

• A. Number of plates less one(n – 1)
• B. Number of plates plus one(n + 1)
• C. Number of plates less two(n - 2)
• D. Number of plates (n)

182. A capacitor consists of two

• A. Conductors only
• B. Dielectric only
• C. Conductors separated by a dielectric
• D. Dielectric separated by a conductor

183. How many coulombs are delivered by a storage battery in 25 hours if it is supplying current at the rate of 3 A?

• A. 2.592 x 10⁵ C
• B. 2.592 x 10³ C
• C. 2.592 x 10⁸ C
• D. 2.592 x 10¹² C

184. When frequency of an ac wave decreases, the value of X_L in a coil

• A. Approaches zero
• B. Gets larger positively
• C. Gets larger negatively
• D. Stays constant

185. The temperature-resistance coefficient of pure gold is

• A. 0.0034
• B. 0.0037
• C. 0.0038
• D. 0.0039

186. The capacitor opposes any change in voltage across it by

• A. Passing a voltage proportional to the rate of change of current
• B. Acting as a short circuit at time equal to zero
• C. Passing a current proportional to the rate of change of voltage
• D. Acting as a short circuit at time equal to infinity

187. What is the most common non-sinusoidal waveform?

• A. Square wave
• B. Triangular wave
• C. Trapezoidal wave
• D. Sawtooth wave

188. Which of the following capacitors is suitable for dc filter circuits?

• A. Mica
• B. Ceramic
• C. Paper
• D. Electrolytic

189. A series RL circuit has R of 10 Ω and X_L of 5 Ω, its impedance in rectangular form is given by

• A. 10 + j 5 Ω
• B. 10 + j 10 Ω
• C. 10 – j 5 Ω
• D. 10 – j 10 Ω

190. What is the reciprocal of capacitance?

• A. Reluctance
• B. Susceptance
• C. Elastance
• D. Conductance

191. If the output resistance of a voltage source is 4 Ω, it internal resistance should be

• A. 4 Ω
• B. 8 Ω
• C. 2 Ω
• D. Infinite

192. The curve between current and frequency is termed as

• A. Voltage curve
• B. Gain curve
• C. Power curve
• D. Resonance curve

193. What is the total effective capacitance of two 0.25 μF capacitors connected in series?

• A. 0.125 μF
• B. 1.25 μF
• C. 0.50 μF
• D. 2.5 if

194. What can be used to estimate resonant frequency and to find reactance at any frequency for any value of capacitor or inductor?

• A. Smith chart
• B. Reactance chart
• C. Impedance chart
• D. Resonance chart

195. For a parallel AC circuit, ______ is used as a reference phasor.

• A. Voltage
• B. Power
• C. Current
• D. Resistance

196. For a series AC circuit, _____ is not used as a reference phasor.

• A. Voltage
• B. Impedance
• C. Current
• D. Conductance

197. If a certain circuit has a current that is lagging the voltage by 45˚, then it displays

• A. Pure inductive reactance
• B. Resistance and capacitance reactance
• C. Resistance and inductive reactance
• D. Pure capacitive reactance

198. What maximum voltage can be applied across the capacitor for very short period of time?

• A. Working voltage
• B. Surge voltage
• C. Stray voltage
• D. Peak voltage

199. What is expected when two 20 kΩ, 1 watt resistor in parallel are use instead of one 10 kΩ, 1 watt?

• A. Provides higher current
• B. Provides less power
• C. Provides more power
• D. Provides wider tolerance

200. Which of the following materials has the lowest dielectric strength?

• A. Glass
• B. Paper
• C. Mica
• D. Teflon

Complete List of MCQs in Electronics Engineering per topic

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101. Conductor

102. Current magnification factor

103. Voltage magnification factor

104. 1.16

105. 1.0

106. Barium-strontium titanite

107. Supplies energy

108. Both active and passive elements

109. 484 Ω

110. A circuit with neither a source of current nor a source of potential difference

111. Loop

112. Zero

113. 0.3 S

114. Volt-coulomb

115. 4 μF

116. Voltage

117. Twice as one

118. Peak factor

119. Equal to the charge of either capacitors

120. Acceptor circuit

121. Rejector circuit

122. Zero signal

123. In-phase

124. Reciprocity theorem

125. Charge

126. Infinite

127. The converse of

128. 400 kΩ

129. Electric current varies directly as the voltage and inversely as the resistance

130. Phasor

131. Half

132. Increase the power rating compared with one resistor alone

133. Phase

134. 1174 V

135. Manganin

136. Permittivity

137. Infinite

138. Number of plates

139. 50

140. It has a varying magnetic field

141. Lower resistance

142. Large internal resistance

143. One circular mil

144. Stores electrical energy

145. Thinness

146. The sum of individual charges

147. Square wave

148. Highest R has the highest V

149. The lowest R has the highest V

150. Variable resistor

Online Questions and Answers Series

Complete List of MCQs in Electronics Engineering per topic

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This is the Multiples Choice Questions Part 3 of the Series in Electrical Circuit as one of the Electronics Engineering topic. In Preparation for the ECE Board Exam make sure to expose yourself and familiarize in each and every questions compiled here taken from various sources including but not limited to past Board Exam Questions in Electronics Engineering field, Electronics Books, Journals and other Electronics References.

Online Questions and Answers Topic Outline

• MCQs in AC-DC circuits
• MCQs in Resistors
• MCQs in Inductors
• MCQs in Capacitors

The Series

Continue Practice Exam Test Questions Part 3 of the Series

101. The potential gradient in a cable is maximum in

• A. Conductor
• B. Outer sheath
• C. Insulation
• D. Uniformly all over

102. The Q-factor of a parallel resonant circuit is also known as

• A. Current magnification factor
• B. Voltage magnification factor
• C. Load factor
• D. Leakage factor

103. The Q-factor of a series resonant circuit is also known as

• A. Current magnification factor
• B. Voltage magnification factor
• C. Load factor
• D. Leakage factor

104. What is the form factor of a triangular wave?

• A. 1.16
• B. 1.11
• C. 1.73
• D. 1.41

105. In a rectangular wave, the form factor is

• A. 1.11
• B. 1.16
• C. 1.0
• D. 1.73

106. Which of the following dielectric materials makes the highest-capacitance capacitor?

• A. Air
• B. Barium-strontium titanite
• C. Mica
• D. Electrolyte

107. In a circuit, an active element is one which

• A. Supplies energy
• B. Receives energy
• C. Both supplies and receives energy
• D. Amplifies signal

108. An electric circuit contains

• A. Passive elements
• B. Active elements
• C. Both active and passive elements
• D. Reactive elements

109. What is the hot resistance of a 100 W, 220 V incandescent lamp?

• A. 2.2 Ω
• B. 22 Ω
• C. 484 Ω
• D. 4.84 Ω

110. Which statement is true about a passive circuit?

• A. A circuit with neither a source of current nor a source of potential difference
• B. A circuit with a voltage source
• C. A circuit with a current source
• D. A circuit with only resistance as a load

111. What is a closed path made of several branches of the network called?

• A. Junction
• B. Node
• C. Terminal
• D. Loop

112. The internal resistance of an ideal voltage source is

• A. Infinite
• B. Equal to the load resistance
• C. Zero
• D. To be determined

113. What is the conductance of a circuit having three 10 Ω resistors in parallel?

• A. 0.3 S
• B. 3.33 S
• C. 0.33 S
• D. 30 S

114. Electric energy refers to

• A. Volt divided by coulomb
• B. Volt-ampere
• C. Volt-coulomb
• D. Watt divided by time

115. A capacitor requires 12 μC of charge to raise its potential of 3 V. What is the capacitance of the capacitor?

• A. 36 μF
• B. 15 μF
• C. 0.25 μF
• D. 4 μF

116. A capacitor opposes change in

• A. Voltage
• B. Current
• C. Voltage and current
• D. Neither voltage nor current

117. What is the total resistance of a two equal valued resistors in series?

• A. The difference of both
• B. The product of both
• C. Twice as one
• D. The sum of their reciprocals

118. The ratio of maximum value to the effective value of an alternating quantity is called

• A. Form factor
• B. Peak factor
• C. Dynamic factor
• D. Leakage factor

119. For series capacitors, total charge is

• A. The sum of individual charges
• B. Equal to the charge of either capacitors
• C. Equal to the product of the charges
• D. The quotient of the charges

120. Series resonant circuit is sometimes known as

• A. Rejector circuit
• B. Acceptor circuit
• C. Inductive circuit
• D. Capacitive circuit

121. Parallel resonant circuit is sometimes called as

• A. Acceptor circuit
• B. Rejector circuit
• C. Inductive circuit
• D. Capacitive circuit

122. When two pure sine waves of the same frequency and the same amplitude which are exactly 180˚ out-of-phase are added together, the result is

• A. A wave with twice the amplitude
• B. A wave with half the amplitude
• C. Zero signal
• D. A wave with twice the frequency

123. If two complex conjugates are added, ___ components results.

124. If an emf in circuit A produces a current in circuit B, then the same emf in circuit B produces the same current in circuit A. this theorem is known as

125. According to Gauss theorem, flux can be equated to

126. An open resistor when checked with an ohmmeter reads

127. Norton’s theorem is ____ Thevenin’s theorem.

128. What value of R is needed with a 0.05 μF C for an RC time constant of 0.02 s?

129. Which of the following is the statement of Ohm’s law?

130. The admittance of a parallel RLC circuit is found to be the ___ sum of conductance and susceptances.

131. A wire of one kilometer length has a resistance of 20 Ω. If the length is halved, then the new resistance is _____ the original resistance.

132. A series-parallel combination of identical resistors will

133. The _____ of an alternating quantity is defined as the fractional part of a period or cycle through which the quantity has advanced from selected origin.

134. An inductive circuit of resistance 16.5 Ω and inductance of 0.14 H takes a current of 25 A. if the frequency is 50 Hz, find the supply voltage.

135. Which of the following has a positive temperature coefficient?

136. The ratio of the flux density to the electric field intensity in the dielectric is called

137. It is impossible to change the voltage across a capacitor instantly, as this would produce _______ current.

138. Which of the following is not a factor affecting capacitance of a basic capacitor?

139. When voltage is applied across a ceramic dielectric the electrostatic field produced is 50 times greater than air dielectric. The dielectric constant of ceramic therefore is

140. The reason why alternating current can induce voltage is

141. When two unequal values of resistors are connected in parallel across a dc source, greater current flows through the

142. A real current source has

143. What is the cross-sectional are of a conductor whose diameter is 0.001 inch?

144. Which of the following describes the action of a capacitor?

145. High resistance values are a consequence of the ___ of the film.

146. For parallel capacitors, total charge is

147. Which waveform in which the rms value and the mean value are equal?

148. In a series circuit with unequal resistances the

149. In a parallel bank with unequal branch resistances

150. A rheostat is a form of

Complete List of MCQs in Electronics Engineering per topic

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