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.
- A. In-phase
- B. Quadrature
- C. Complex
- D. Out-of-phase
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
- A. Maximum power transfer theorem
- B. Millman’s theorem
- C. Reciprocity theorem
- D. Norton’s theorem
125. According to Gauss theorem, flux can be equated to
- A. Charge
- B. Field intensity
- C. Current
- D. Voltage
126. An open resistor when checked with an ohmmeter reads
- A. Zero
- B. Infinite
- C. High but within the tolerance
- D. Low but not zero
127. Norton’s theorem is ____ Thevenin’s theorem.
- A. The same as
- B. The converse of
- C. Older that
- D. More accurate than
128. What value of R is needed with a 0.05 μF C for an RC time constant of 0.02 s?
- A. 400 Ω
- B. 400 MΩ
- C. 400 GΩ
- D. 400 kΩ
129. Which of the following is the statement of Ohm’s law?
- A. Electric current is directly proportional to both voltage and resistance
- B. Electric current varies directly as the voltage and inversely as the resistance
- C. Electrical power is directly proportional to the resistance and inversely as the current squared
- D. Electrical power is directly proportional to both voltage squared and the resistance
130. The admittance of a parallel RLC circuit is found to be the ___ sum of conductance and susceptances.
- A. Algebraic
- B. Arithmetic
- C. Vector
- D. Phasor
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.
- A. Half
- B. Twice
- C. One-fourth
- D. Three times
132. A series-parallel combination of identical resistors will
- A. Increase the power rating compared with one resistor alone
- B. Increase the voltage rating compared with one resistor alone
- C. Reduce the voltage rating compared with resistor alone
- D. Result in an expensive circuit
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.
- A. Phase
- B. Frequency
- C. Amplitude
- D. Waveform
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.
- A. 1501 V
- B. 1174 V
- C. 1877 V
- D. 991 V
135. Which of the following has a positive temperature coefficient?
- A. Mica
- B. Manganin
- C. Silicon
- D. Carbon
136. The ratio of the flux density to the electric field intensity in the dielectric is called
- A. Permittivity
- B. Field intensity
- C. Permeability
- D. Elasticity
137. It is impossible to change the voltage across a capacitor instantly, as this would produce _______ current.
- A. Infinite
- B. Zero
- C. Low
- D. High
138. Which of the following is not a factor affecting capacitance of a basic capacitor?
- A. Area of plates
- B. Number of plates
- C. Distance between plates
- D. Dielectric material used
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
- A. 50
- B. 100
- C. 16.67
- D. 5
140. The reason why alternating current can induce voltage is
- A. It has high peak value
- B. It has a stronger magnetic field than direct current
- C. It has a constant magnetic field
- D. It has a varying magnetic field
141. When two unequal values of resistors are connected in parallel across a dc source, greater current flows through the
- A. Higher resistance
- B. Lower resistance
- C. Higher wattage resistance
- D. Lower wattage resistance
142. A real current source has
- A. Infinite internal resistance
- B. Zero internal resistance
- C. Large internal resistance
- D. Small internal resistance
143. What is the cross-sectional are of a conductor whose diameter is 0.001 inch?
- A. One micron
- B. One angstrom
- C. One steradian
- D. One circular mil
144. Which of the following describes the action of a capacitor?
- A. Stores electrical energy
- B. Opposes changes in current flow
- C. Creates a dc resistance
- D. Converts ac to dc
145. High resistance values are a consequence of the ___ of the film.
- A. Thickness
- B. Length
- C. Thinness
- D. Area
146. For parallel 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
147. Which waveform in which the rms value and the mean value are equal?
- A. Square wave
- B. Triangular wave
- C. Sine wave
- D. Sawtooth
148. In a series circuit with unequal resistances the
- A. Highest R has the highest V
- B. Lowest R has the highest V
- C. Lowest R has the highest I
- D. Highest R has the highest I
149. In a parallel bank with unequal branch resistances
- A. The highest R has the highest I
- B. The lowest R has the highest V
- C. The lowest R has the lowest V
- D. The highest R has the highest V
150. A rheostat is a form of
- A. Variable resistor
- B. Variable capacitor
- C. Potentiometer
- D. Thermocouple
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