Explore topic-wise MCQs in Electronics.

This section includes 78 Mcqs, each offering curated multiple-choice questions to sharpen your Electronics knowledge and support exam preparation. Choose a topic below to get started.

51.

If the pulse width were cut in half in the given circuit, the voltage across the resistor would be ______ at the end of the pulse.

A. 0 V
B. 0.36 V
C. 0.46 V
D. 0.9 V
Answer» D. 0.9 V
Discussion
52.

If the pulse source has an internal resistance of 80 in the given circuit, it will take ______ for the output voltage to decrease to zero.

A. 1 ms
B. 1.1 ms
C. 1.2 ms
D. 2.5 ms
Answer» C. 1.2 ms
Discussion
53.

During the steady-state condition of a differentiator, the average output voltage is zero volts.

A. 1
B.
Answer» B.
Discussion
54.

The output voltage of an RC integrator will eventually equal the voltage of a single input pulse if the input pulse width is less than 5 time constants.

A. 1
B.
Answer» C.
Discussion
55.

If the output of an RC integrator is zero volts, the capacitor might be open.

A. 1
B.
C. 1
D.
Answer» C. 1
Discussion
56.

If the capacitor in an RC integrator shorts, the output

A. is at ground
B. would measure the same as the input
C. would measure zero volts
D. None of the above
Answer» B. would measure the same as the input
Discussion
57.

Which of the following is true for a capacitor?

A. A capacitor acts like a short to instantaneous changes in current.
B. A capacitor's voltage cannot change instantaneously.
C. A capacitor acts like an open to dc.
D. All of the above
Answer» E.
Discussion
58.

The output of an RC differentiator is taken from across the capacitor.

A. 1
B.
Answer» C.
Discussion
59.

What has the voltage across the resistor decayed to by the end of the pulse in the given circuit?

A. 0 V
B. 0.75 V
C. 5.55 V
D. 14.25 V
Answer» C. 5.55 V
Discussion
60.

For a capacitor to completely charge in an RC integrator, the pulse width must be _____ 5 time constants.

A. less than
B. greater than
C. equal to
D. greater than or equal to
Answer» E.
Discussion
61.

The given circuit is an

A. RL integrator
B. RC differentiator
C. RL differentiator
D. RC integrator
Answer» E.
Discussion
62.

The output of an RL differentiator is taken from across the inductor.

A. 1
B.
Answer» B.
Discussion
63.

The voltage across the capacitor in the given circuit is _______ at the beginning of the second pulse. Assume the capacitor is initially uncharged.

A. 0 V
B. 427.74 mV
C. 2.8 V
D. 7.56 V
Answer» C. 2.8 V
Discussion
64.

The output of a differentiator could be considered a spike when the input pulse width is much longer than 5 time constants.

A. 1
B.
Answer» B.
Discussion
65.

The _____ is the time it takes for a capacitor to fully charge or discharge.

A. transient time
B. pulse response
C. time constant
D. steady state
Answer» B. pulse response
Discussion
66.

The steady-state condition of an integrator is reached after 5 time constants regardless of the number of input pulses that occur in that amount of time.

A. 1
B.
C. 1
D.
Answer» B.
Discussion
67.

After the rising edge of the input pulse occurs, it takes ______ for the voltage across the resistor to decrease to zero in the given circuit.

A. 0 s
B. 68 s
C. 340 s
D. 500 s
Answer» D. 500 s
Discussion
68.

What is the voltage across the inductor in the given circuit on the falling edge of the first input pulse?

A. –0.2 V
B. 0.2 V
C. –9.8 V
D. 9.8 V
Answer» B. 0.2 V
Discussion
69.

It takes ______ for the output voltage in the given circuit to reach its maximum value.

A. 0 s
B. 243.9 s
C. 1 ms
D. 1.22 ms
Answer» E.
Discussion
70.

How long will it take the capacitor in the given circuit to discharge?

A. 16.4 s
B. 32.8 s
C. 65.6 s
D. 82 s
Answer» E.
Discussion
71.

An RL integrator and an RC differentiator can act as what types of filters, respectively?

A. low-pass, low-pass
B. low-pass, high-pass
C. high-pass, high-pass
D. high-pass, low-pass
Answer» C. high-pass, high-pass
Discussion
72.

A repetitive pulse with a 50% duty cycle is being applied to the input of an RC integrator. If one time constant is less than one-fifth the pulse width, the capacitor will be able to fully charge and discharge.

A. 1
B.
C. 1
D.
Answer» B.
Discussion
73.

In a repetitive-pulse RC integrator circuit, what would the steady-state voltage equal at the end of the fifth pulse? Assume a Vin of 20 V.

A. 1.46 V
B. 14.62 V
C. 20 V
D. 0 V
Answer» C. 20 V
Discussion
74.

In the given circuit, what must the pulse width and time between pulses be to allow the capacitor to completely charge by the end of each pulse and to completely discharge between each pulse?

A. 940 s
B. 2.82 ms
C. 3.76 ms
D. 4.7 ms
Answer» E.
Discussion
75.

If a periodic pulse waveform is applied to an RC differentiating circuit, which two conditions are possible?

A. tw 5 or tw > 5
B. tw = 5 or tw > 5
C. tw 5 or tw < 5
D. tw 5 or tw < 5
Answer» E.
Discussion
76.

What is a circuit that produces short-duration spikes?

A. A trigger pulse generator
B. An RL integrator
C. A timing circuit
D. A pulse waveform-to-dc converter
Answer» B. An RL integrator
Discussion
77.

The output voltage in the given circuit is _____ at the end of the second pulse.

A. 1.06 V
B. 7.56 V
C. 3.32 V
D. 12 V
Answer» D. 12 V
Discussion
78.

What voltage will the capacitor charge up to in the given circuit for the single input pulse shown?

A. 3.15 V
B. 4.3 V
C. 4.75 V
D. 4.9 V
Answer» C. 4.75 V
Discussion