Q. A BJT has an IB of 50 µA and a βDC of 75; IC is:
β
Correct Answer: (C)
3.75 ma
Electronic Devices and Circuits MCQs | Page - 4
Dear candidates you will find MCQ questions of Electronic Devices and Circuits here. Learn these questions and prepare yourself for coming examinations and interviews. You can check the right answer of any question by clicking on any option or by clicking view answer button.
Q. A certain transistor has IC = 15 mA and IB = 167 µA; βDC is:
β
Correct Answer: (D)
90
Q. Class B operation is provided when the dc bias leaves the transistor biased just off, the transistor turning on when the ac signal is applied.
β
Correct Answer: (A)
true
Q. Calculate the efficiency of a class B amplifier for a supply voltage of VCC = 20 V with peak output voltage of VL(p) = 18 V. Assume RL = 16 β¦.
β
Correct Answer: (C)
70.69%
Q. Which of the following is (are) the disadvantage(s) of a class B complementary-symmetry circuit?
β
Correct Answer: (D)
all of the above
Q. nMOS and pMOS transistors can be used for class B.
β
Correct Answer: (A)
true
Q. Calculate the harmonic distortion component for an output signal having fundamental amplitude of 3 V and a second harmonic amplitude of 0.25 V.
β
Correct Answer: (D)
8.33%
Q. Which of the following instruments displays the harmonics of a distorted signal?
β
Correct Answer: (B)
spectrum analyzer
Q. Which of the following instruments allows more precise measurement of the harmonic components of a distorted signal?
β
Correct Answer: (D)
wave analyzer
Q. What is the maximum temperature rating for silicon power transistors?
β
Correct Answer: (C)
150º to 200º
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