Explore topic-wise MCQs in Electrical Engineering.

This section includes 62 Mcqs, each offering curated multiple-choice questions to sharpen your Electrical Engineering knowledge and support exam preparation. Choose a topic below to get started.

51.

Referring this figure, on the falling edge,

A. the resistor voltage drops to –5 V and then goes back to zero exponentially
B. the resistor voltage jumps to –5 V and then goes back to zero exponentially
C. the capacitor voltage remains constant
D. the resistor voltage jumps to +5 V and then decreases exponentially to zero
Answer» C. the capacitor voltage remains constant
Discussion
52.

A single 6 V pulse with a width of 600 s is applied to an integrator consisting of a 150 k resistor and a 0.002 F capacitor. To what voltage will the capacitor charge?

A. 0 V
B. 3.78 V
C. 5.16 V
D. 6 V
Answer» D. 6 V
Discussion
53.

With an RL integrator, at the instant of the rising pulse edge,

A. all the input voltage is across the resistor
B. all the input voltage is across the inductor
C. 63 percent of the input voltage is across the resistor
D. 63 percent of the input voltage is across the inductor
Answer» C. 63 percent of the input voltage is across the resistor
Discussion
54.

An integrator consists of a 3.3 k resistor and a 2 F capacitor. A single 30 V, 6 ms pulse is applied to the input. How much will the capacitor charge?

A. 10.3 V
B. 30 V
C. 12.09 V
D. 17.91 V
Answer» E.
Discussion
55.

If the capacitor in an integrator becomes leaky,

A. the time constant will be effectively reduced
B. the waveshape of the output voltage across C is altered
C. the amplitude of the output is reduced
D. all of the above
Answer» E.
Discussion
56.

Referring this circuit, determine the maximum output voltage when a single pulse is applied as shown. The total resistance is 60 .

A. 2.73 V
B. 27.33 V
C. 30 V
D. 2.67 V
Answer» C. 30 V
Discussion
57.

When a 12 V input pulse with a width equal to one time constant is applied to an RC integrator, the capacitor charges to

A. 0 V
B. 12 V
C. 6.3 V
D. 7.56 V
Answer» E.
Discussion
58.

Referring to Problem 5, how long will it take the capacitor to discharge if the internal resistance of the pulse source is 100 ?

A. 300 s
B. 600 s
C. 900 s
D. 1.5 ms
Answer» E.
Discussion
59.

If a periodic pulse waveform has a pulse width and the time between pulses each equal to or greater than five time constants, the capacitor will

A. partially charge and fully discharge during each period of the input waveform
B. fully charge and partially discharge during each period of the input waveform
C. fully charge and fully discharge during each period of the input waveform
D. partially charge and partially discharge during each period of the input waveform
Answer» D. partially charge and partially discharge during each period of the input waveform
Discussion
60.

The flat portions of a pulse waveform contain low-frequency components.

A. 1
B.
C. 1
D.
Answer» B.
Discussion
61.

In an RC differentiator, responding to repetitive pulses, the average value of the output

A. is zero
B. is equal to the input voltage
C. is 63 percent of the input voltage
D. cannot be determined
Answer» B. is equal to the input voltage
Discussion
62.

When a 15 V input pulse with a width equal to two time constants is applied to an RC integrator, the capacitor charges to

A. 15 V
B. 12.9 V
C. 8.6 V
D. 19.45 V
Answer» C. 8.6 V
Discussion