This is the Section 2 Module 1 of the compiled Electronics Coaching Materials taken from different sources including but not limited to Electronics books, past Board Exams Questions, Journals and other Electronics References. This particular Coaching Notes in Electronics Engineering has random Questions and Answers in random topics. Make sure to familiarize each questions to increase the chance of passing the ECE Board Exam.
Electronics Engineering Coaching: Section 2 Module 1
MAGNETIC CIRCUITS
1. Ferromagnetic core is placed in inductors to
INCREASE INDUCTANCE
2. Lenz’s law is the consequence of the law of conservation of
ENERGY
3. Force between a magnet and a piece of ferromagnetic material that is not yet magnetized
IS NEVER REPULSIVE
4. A high retentivity material is useful to
MAKE PERMANENT MAGNET
5. Characteristic of a DC electromagnet
CONSTANT POLARITY
6. The intensity of magnetic lines of force are maximum
MAGNETIC POLES
7. When charges are forced to move by the electric field of a potential difference, ___ current is said to flow
DRIFT CURRENT
8. In magnetic video tape, video track is________
DIAGONAL
ELECTRICAL ELEMENTS
1. Capacitor store charge a. . .electric . . .
ELECTRIC FIELD
2. In series-parallel network……. used same _________
RESISTOR
3. Converts ac voltage to another ac voltage level
AC – CONVERTER
4. Plastic insulation is used in what voltage level
MEDIUM TO LOW
5. Peak-to-peak amplitude of a perfect sine wave is equal to ___
TWICE THE PEAK AMPLITUDE
6. Dielectric material for electric ion
MICA
7. In negative coefficient, capacitance _______ as temperature rises
DECREASE
8. Dielectric material used in high voltage transformer.
PORCELAIN
9. An advantage of toroidal coil over solenoid is that the magnetic flux in the toroidal coil is contained
WITHIN THE CORE
10. As the area of the plate increases, the capacitor _________ increases.
CAPACITANCE
11. The connection between circuit elements
JUNCTION
12. Metal film resistor has low
INDUCTANCE
13... move closer to solenoid
INCREASES
14. Inductor works by storing energy in a …
MAGNETIC FIELD
15. Type of resistor with color band in the body
CARBON-COMPOSITION RESISTOR
16. Total opposition of current flow
IMPEDANCE
17. Enamel insulating wire is the same as
Metal Wire
18. Capacitance in a reverse bias circuit _____
DECREASES
19. Completely non-reactive
CARBON COMPOSITION
20. Straight wire is _____ in near wire
STRONGER
21. Controls the output voltage
FIELD VOLTAGE
DIRECT CURRENT
1. Node which KCL is applicable
PRINCIPAL NODE
2. “When any number of voltage sources of arbitrarily generated voltage and finite internal resistance different from zero are connected in parallel, resulting voltage across the parallel combination is the ratio of the algebraic sum of the internal conductance”
MILLMAN’S THEOREM
AC CIRCUITS
1. It can vary AC but not DC
FREQUENCY
2. Heat dissipation of AC circuits depends on the ____of the circuit
RESISTANCE
3. Relay is used to ____ the current
DECREASE
4. What term is used to describe current pulses that flow in the same direction?
PULSATING DIRECT CURRENT
5. Ratio of the rms value to the mean average value
FORM FACTOR
6. High ac- voltage, low dc- voltage
INVERTER
7. Usual input to electric switching device
SQUARE WAVE
8. Other name of closed-path
LOOP
TRANSIENT/ RESONANCE
1. Greatest factor on the figure of merit of a circuit
RESISTANCE
SEMICONDUCTORS
1. Another name for step recovery diode
CHARGE STORAGE DIODE
2. When diode increases voltage the
RESISTANCE DECREASE
3. Parameter of a common base gain
ALPHA
4. Transduction principle used in optical sensors
PHOTOVOLTAIC TRANSDUCTION
5. Rejects common mode signals present on both inputs
CMRR
6. Element with exactly four valence electrons is an _____ semiconductor
ELEMENTAL
7. Capacitance in a reverse bias PN-junction depends on ____.
REVERSE SATURATION CURRENT
8. Majority of power diode uses
SILICON
9. Trivalent, boron gallium
INDIUM
10. Gunnplexer is used in ________
MICROWAVE COMMUNICATION
11. Compound hysteresis
SCHMITT TRIGGER
12. Photodiode when not used as a photovoltaic cell
REVERSE BIAS
13. The semiconductor doping impurities arsenic, antimony, and bismuth are classified as what type of impurities?
PENTAVALENT
14. Device used in microwave frequency
GUNNDIODE
15. Another term for trivalent impurity atom
ACCEPTOR
16. An alloy that melts directly to liquid and have no plastic or semi-liquid state
EUTECTIC ALLOY
17. The ability of a substance to exist in more than four lattice form is called
ALLOTROPY
18. In PNP transistor, the collector is ______ with respect to emitter
NEGATIVE
19. A zener has a _______ resistance.
NEGATIVE
20. Transient suppression avoid the risk of
DIODE FAILURE
21. Most commonly used semiconductor material
SILICON
22. Flow of holes
PLUS- MINUS
23. Maximum reverse voltage applied before entering the zener region –
PIV
24. In common base, output is taken at
COLLECTOR
25. In zener diode, the region where current is in opposite direction of the forward bias current
ZENER REGION
26. Zener is useful as
AMPLIFIER
27. Not a characteristic of CMOS chip
ABILITY TO HANDLE EXTREMELY HIGH POWER
28. Semiconductor is reverse biased to large amount of enough voltage
AVALANCHE EFFECT
29. Kind of Bias that is Constant & improve
COMBINATIONAL BIAS
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