Top 250+ Solved Electronic Devices and Circuits MCQ Questions Answer
Q. The BJT is a device. The FET is a device.
a. bipolar, bipolar
b. bipolar, unipolar
c. unipolar, bipolar
d. unipolar, unipolar
Q. The Bode plot is applicable to
a. all phase network
b. minimum phase network
c. maximum phase network
d. lag lead network
Q. For any inverting amplifier, the impedance capacitance will be by a Miller effect capacitance sensitive to the gain of the amplifier and the interelectrode capacitance.
a. unaffected
b. increased
c. decreased
d. none of the above
Q. You have a need to apply an amplifier with a very high power gain. Which of the following would you choose?
a. common-collector
b. common-base
c. common-emitter
d. emitter- follower
Q. A common-emitter amplifier has voltage gain, current gain, power gain, and input impedance.
a. high, low, high, low
b. high, high, high, low
c. high, high, high, high
d. low, low, low, high
Q. To analyze the common-emitter amplifier, what must be done to determine the dc equivalent circuit?
a. leave circuit unchanged
b. replace coupling and bypass capacitors with opens
c. replace coupling and bypass capacitors with shorts
d. replace vcc with ground
Q. What is re equal to in terms of h parameters?
a. hre / hoe
b. (hre + 1) / hoe
c. hie – (hre / hoe)(1+ hfe)
d. hfe
Q. The advantage that a Sziklai pair has over a Darlington pair is
a. higher current gain.
b. less input voltage is needed to turn it on.
c. higher input impedance.
d. higher voltage gain.
Q. What is the device in a transistor oscillator?
a. lc tank circuit
b. biasing circuit
c. transistor
d. feedback circuit
Q. When the collector supply is 5V, then collector cut off voltage under dc condition is
a. 20 v
b. 10 v
c. 2.5 v
d. 5 v
Q. The common base (CB) amplifier has a compared to CE and CC amplifier.
a. lower input resistance
b. larger current gain
c. larger voltage gain
d. higher input resistance
Q. When a FET with a lower transconductance is substituted into a FET amplifier circuit, what happens?
a. the current gain does not change
b. the voltage gain decreases
c. the circuit disamplifies
d. the input resistance decreases
Q. What is the gain of an amplifier with negative feedback if the feedback factor is 0.01?
a. 10
b. 1000
c. 100
d. 500
Q. The current gain of an emitter follower is
a. equal to 1
b. greater than 1
c. less than 1
d. zero