Explore topic-wise MCQs in Electronic Devices and Circuits.

This section includes 6 Mcqs, each offering curated multiple-choice questions to sharpen your Electronic Devices and Circuits knowledge and support exam preparation. Choose a topic below to get started.

1.

In designing with op amps one has to check the limitations on the voltage and frequency ranges of operation of the closed-loop amplifier, imposed by the op-amp finite bandwidth (ft), slew rate (SR), and output saturation (Vo max). Consider the use of an op amp with ftt = 2 MHz, SR = 1 V/ s, and V0 max = 10 V in the design of a non-inverting amplifier with a nominal gain of 10. Assume a sine-wave input with peak amplitude Vi. If f = 20 kHz, what is the maximum value of Vi before the output distorts?

A. 0.397 V
B. 0.795 V
C. 1.192 V
D. 1.590 V
Answer» C. 1.192 V
Discussion
2.

In designing with op amps one has to check the limitations on the voltage and frequency ranges of operation of the closed-loop amplifier, imposed by the op-amp finite bandwidth (ft), slew rate (SR), and output saturation (Vo max). Consider the use of an op amp with ftt = 2 MHz, SR = 1 V/ s, and V0 max = 10 V in the design of a non-inverting amplifier with a nominal gain of 10. Assume a sine-wave input with peak amplitude Vi. If Vi = 0.5 V, what is the maximum frequency before the output distorts?

A. 31.8 kHz
B. 318 kHz
C. 3.18 kHz
D. 3.18 MHz
Answer» B. 318 kHz
Discussion
3.

An op amp having a slew rate of 20 V/ s is to be used in the unity-gain follower configuration, with input pulses that rise from 0 to 3 V. What is the shortest pulse that can be used while ensuring full-amplitude output?

A. 0.10 s
B. 0.15 s
C. 0.20 s
D. 0.30 s
Answer» C. 0.20 s
Discussion
4.

For operation with 10-V output pulses with the requirement that the sum of the rise and fall times represent only 20% of the pulse width (at half amplitude), what is the slew-rate requirement for an op amp to handle pulses 2 s wide? (Note: The rise and fall times of a pulse signal are usually measured between the 10%- and 90%-height points.)

A. 10 V/ s
B. 20 V/ s
C. 40 V/ s
D. 80 V/ s
Answer» D. 80 V/ s
Discussion
5.

A particular op amp using 15-V supplies operates linearly for outputs in the range 12 V to +12 V. If used in an inverting amplifier configuration of gain 100, what is the rms value of the largest possible sine wave that can be applied at the input without output clipping?

A. 120 mV
B. 60 mV
C. 84.85 mV
D. 42.42 mV
Answer» D. 42.42 mV
Discussion
6.

Slew rate of an amplifier is defined as

A. Minimum rate of change of the output possible in a real operational amplifier
B. Maximum rate of change of the output possible in a real operational amplifier
C. Average rate of change of the output possible in a real operational amplifier
D. Ratio of the maximum and the average rate of change of the output in a real amplifier
Answer» C. Average rate of change of the output possible in a real operational amplifier
Discussion