Analog Electronics MCQs

Option A: ac collector voltage is 180° out of phase with ac base voltage

Option B: ac emitter voltage is 180° out of phase with ac base voltage

Option C: ac collector voltage is in phase with ac base voltage

Option D: none of the above

Correct Answer: ac collector voltage is 180° out of phase with ac base voltage ✔

Option A: preventing radio interference

Option B: preventing photo-emission effects

Option C: avoiding loss of free electrons

Option D: mechanical ruggedness

Correct Answer: mechanical ruggedness ✔

Option A: CC-CB .

Option B: CE-CB

Option C: CB-CC

Option D: CE-CC

Correct Answer: CE-CB ✔

Option A: 49dB

Option B: 51dB

Option C: 98dB

Option D: 102dB

Correct Answer: 98dB ✔

Option A: 795mV

Option B: 395mV

Option C: 795 mV

Option D: 39.5mV

Correct Answer: 795 mV ✔

Option A: fT =1.64 x 108 Hz & fβ = 1.47 x 1010 Hz.

Option B: fT =1.47 x 1010 Hz & fβ = 1.64 x 108 Hz

Option C: fT =1.33 x 1012 Hz & fβ = 1.47 x 1010 Hz

Option D: fT =1.47 x 1010 Hz & fβ = 1.33 x 1012 Hz

Correct Answer: fT =1.47 x 1010 Hz & fβ = 1.64 x 108 Hz ✔

Option A: resistor

Option B: inductor

Option C: capacitor

Option D: battery

Correct Answer: capacitor ✔

Option A: 2.3mA

Option B: 3.2mA

Option C: 4.6 mA

Option D: 5.2mA

Correct Answer: 5.2mA ✔

Option A: voltage shunt feedback

Option B: current series feedback

Option C: negative voltage feedback

Option D: positive current feedback

Correct Answer: negative voltage feedback ✔

Option A: 2

Option B: 1

Option C: 1/2

Option D: 0

Correct Answer: 2 ✔

Option A: current controlled capacitor

Option B: voltage controlled capacitor

Option C: current controlled inductor

Option D: voltage controlled inductors

Correct Answer: voltage controlled capacitor ✔

Option A: Common base

Option B: Common emitter

Option C: Common collector

Option D: All have the same gain

Correct Answer: Common emitter ✔

Option A: cut off point

Option B: saturation point

Option C: operating point

Option D: quasi saturation point

Correct Answer: cut off point ✔

Option A: 99%

Option B: 85%

Option C: 50%

Option D: 25%

Correct Answer: 25% ✔

Option A: Only the temperature

Option B: only the β of the transistor

Option C: Both Temperature & β

Option D: None of the above

Correct Answer: Both Temperature & β ✔

Option A: A unity gain non-inverting amplifier

Option B: A unity gain inverting amplifier

Option C: An inverting amplifier with a gain of 10

Option D: An inverting amplifiers with a gain of 100

Correct Answer: A unity gain inverting amplifier ✔

Option A: Vdc = Vm/π, PIV=2Vm

Option B: Vdc = 2Vm/π, PIV=2vm

Option C: Vdc = 2Vm/π, PIV=Vm

Option D: Vdc = Vm/π, PIV=Vm

Correct Answer: Vdc = 2Vm/π, PIV=2vm ✔

Option A: Current controlled Current source

Option B: Current controlled voltage source

Option C: Voltage controlled voltage source

Option D: voltage controlled current source

Correct Answer: voltage controlled current source ✔

Option A: Internal Capacitance of the device

Option B: Coupling capacitor at the input

Option C: Skin effect

Option D: Coupling capacitor at the output

Correct Answer: Internal Capacitance of the device ✔

Option A: Transistor capacitances

Option B: High current effects in the base

Option C: Parasitic inductive elements

Option D: The early effect

Correct Answer: Transistor capacitances ✔

Option A: Reduces gain

Option B: Increase frequency &phase distortion

Option C: Reduces bandwidth

Option D: Increases noise

Correct Answer: Reduces gain ✔

Option A: get maximum efficiency

Option B: remove even harmonics

Option C: overcome a crossover distortion

Option D: reducing collector dissipation

Correct Answer: overcome a crossover distortion ✔

Option A: 0.25

Option B: 0.5

Option C: 0.75

Option D: 1

Correct Answer: 0.5 ✔

Option A: Gate voltage

Option B: Drain voltage

Option C: Source voltage

Option D: Body voltage

Correct Answer: Drain voltage ✔

Option A: CMMR

Option B: Bandwidth

Option C: Slew rate

Option D: Open-loop gain

Correct Answer: Slew rate ✔

Option A: 10 volts

Option B: 5 volts

Option C: 5/1 volts

Option D: 5/2 volts

Correct Answer: 5/2 volts ✔

Option A: greater than +100

Option B: slightly less than unity but positive

Option C: exactly unity but negative

Option D: about -10

Correct Answer: greater than +100 ✔

Option A: fast turn-on

Option B: fast turn-off

Option C: large collector-base reverse bias

Option D: large emitter-base forward bias

Correct Answer: large collector-base reverse bias ✔

Option A: the amplitude of output is proportional to rate of change of input

Option B: the amplitude of output is proportional to input

Option C: output occurs when input is finite and constant

Option D: polarity of input and output is the same

Correct Answer: the amplitude of output is proportional to rate of change of input ✔

Option A: all resistors

Option B: all transistors

Option C: all inductors

Option D: all capacitors

Correct Answer: all capacitors ✔

Option A: negligible input resistance and high output resistance

Option B: high input resistance and low output resistance

Option C: medium input resistance and high output resistance

Option D: low input resistance as well as output resistance

Correct Answer: medium input resistance and high output resistance ✔

Option A: doping of base

Option B: size of emitter

Option C: rating of transistor

Option D: temperature

Correct Answer: temperature ✔

Option A: Increase in both input & output impedances

Option B: Decreases in both input & output impedances

Option C: Increase in input impedance & decreases in output impedance

Option D: Decrease in input impedance & increase in output impedance

Correct Answer: Increase in input impedance & decreases in output impedance ✔

Option A: resistor between source and load

Option B: inductor between source and load

Option C: capacitor between source and load

Option D: either A. or B.

Correct Answer: capacitor between source and load ✔

Option A: gm r0

Option B: gm / r0

Option C: gm rπ

Option D: gm /rπ

Correct Answer: gm rπ ✔

Option A: Current controlled Current source

Option B: Current controlled voltage source

Option C: Voltage controlled voltage source

Option D: voltage controlled current source

Correct Answer: Current controlled voltage source ✔

Option A: 1/11KΩ

Option B: 1/5KΩ

Option C: 5KΩ

Option D: 11KΩ

Correct Answer: 1/11KΩ ✔

Option A: 23dB

Option B: 25dB

Option C: 46dB

Option D: 50dB

Correct Answer: 46dB ✔

Option A: 50 KHz

Option B: 100KHz

Option C: 1000/17 KHz

Option D: 1000/7.07 KHz

Correct Answer: 100KHz ✔

Option A: 5 Ω & 20 %

Option B: 25 Ω & 20 %

Option C: 5 Ω & 16.7 %

Option D: 25 Ω & 16.7 %

Correct Answer: 5 Ω & 20 % ✔

Option A: input voltage dependent linear transfer characteristic

Option B: high voltage gain

Option C: high input resistance

Option D: high CMRR

Correct Answer: high CMRR ✔

Option A: Q –factor of the tuned o/p circuit

Option B: Q –factor of the tuned i/p circuit

Option C: Quiescent operating point

Option D: Q-factor of the o/p and i/p circuits as well as quiescent operating point

Correct Answer: Q –factor of the tuned o/p circuit ✔

Option A: 1 v

Option B: 2v

Option C: 1.4v

Option D: 2.8v

Correct Answer: 2v ✔

Option A: the edge of the depletion region on the p-side

Option B: the edge of the depletion region on the n-side

Option C: the p-n junction

Option D: the center of the depletion region on the n-side

Correct Answer: the p-n junction ✔

A. affects the difference mode gain Ad
B. affects the common mode gain Ac
C.affects both Ad and Ac
D. does not effect either Ad and Ac

Correct Answer: affects the common mode gain Ac ✔

Option A: the mobility decreases

Option B: the transconductance increases

Option C: the drain current increases

Option D: none of the above

Correct Answer: the mobility decreases ✔

Option A: junction capacitance

Option B: charge storage capacitance

Option C: depletion capacitance

Option D: channel length modulation

Correct Answer: channel length modulation ✔