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.

1.

In an integrating circuit, the output voltage is taken across the capacitor.

A. True
B. False
Answer» B. False
Discussion
2.

In an differentiating circuit, the output voltage is taken across the resistor.

A. True
B. False
Answer» B. False
Discussion
3.

An differentiator acts as a

A. low-pass filter
B. high-pass filter
C. band-pass filter
D. band-stop filter
Answer» C. band-pass filter
Discussion
4.

In an differentiator, when the input pulse goes from its low level to its high level,

A. the inductor prevents a sudden change in voltage
B. the inductor prevents a sudden change in current
C. voltage across the inductor instantly reaches 63% of input voltage
D. voltage across the inductor is zero
Answer» C. voltage across the inductor instantly reaches 63% of input voltage
Discussion
5.

When a 15 V input pulse with a width equal to two time constants is applied to an 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
6.

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
7.

In an 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
8.

The output of an integrator is taken across the

A. diode
B. capacitor
C. resistor
D. source
Answer» C. resistor
Discussion
9.

When a 24 V input pulse with a width equal to five time constants is applied to an integrator, the capacitor charges to

A. 24 V
B. 15.12 V
C. 20.64 V
D. 12 V
Answer» B. 15.12 V
Discussion
10.

If the time constant of an integrator is increased, as the time constant is increased

A. the capacitor charges more during a pulse and discharges less between pulses
B. the capacitor charges less during a pulse and discharges more between pulses
C. the capacitor charges more during a pulse and discharges more between pulses
D. the capacitor charges less during a pulse and discharges less between pulses
Answer» E.
Discussion
11.

In an differentiator, the sum of the capacitor voltage and the resistor voltage at any instant

A. must be zero
B. must be equal to the applied voltage
C. is less than the applied voltage but greater than zero
D. cannot be determined
Answer» C. is less than the applied voltage but greater than zero
Discussion
12.

In an integrating circuit, the output voltage is taken across the inductor.

A. True
B. False
Answer» C.
Discussion
13.

What is the highest frequency contained in a pulse that has a rise and fall time equal to 10 microseconds (10 s)?

A. 35 kHz
B. 3.5 kHz
C. 10 kHz
D. 100 kHz
Answer» B. 3.5 kHz
Discussion
14.

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
15.

With an 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
16.

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

A. 0 V
B. 12 V
C. 6.3 V
D. 7.56 V
Answer» E.
Discussion
17.

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
18.

In an differentiator, the capacitor

A. charges exponentially at a rate depending on the
B. time constant
C. charges exponentially at a rate depending on the input voltage
D. charges when the input voltage is decreasing
E. charges to approximately one time constant
Answer» B. time constant
Discussion
19.

If the RC time constant of an integrator is increased, as the time constant is increased.

A. he capacitor charges more during a pulse and discharges less between pulses
B. he capacitor charges less during a pulse and discharges more between pulses
C. he capacitor charges more during a pulse and discharges more between pulses
D. he capacitor charges less during a pulse and discharges less between pulses
Answer» E.
Discussion
20.

If the capacitor in an integrator opens, the output has the same voltage as the input.

A. rue
B. alse
Answer» B. alse
Discussion
21.

Referring this figure, on the falling edge.

A. he resistor voltage drops to -5 V and then goes back to zero exponentially
B. he resistor voltage jumps to -5 V and then goes back to zero exponentially
C. he capacitor voltage remains constant
D. he resistor voltage jumps to +5 V and then decreases exponentially to zero
Answer» C. he capacitor voltage remains constant
Discussion
22.

In an RC differentiator, the sum of the capacitor voltage and the resistor voltage at any instant.

A. ust be zero
B. ust be equal to the applied voltage
C. s less than the applied voltage but greater than zero
D. annot be determined
Answer» C. s less than the applied voltage but greater than zero
Discussion
23.

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

A. 0.3 V
B. 0 V
C. 2.09 V
D. 7.91 V
Answer» E.
Discussion
24.

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

A. V
B. .78 V
C. .16 V
D. V
Answer» D. V
Discussion
25.

The rising and falling edges of a pulse waveform contain the higher frequency component.

A. rue
B. alse
Answer» B. alse
Discussion
26.

In an RC integrating circuit, the output voltage is taken across the capacitor.

A. rue
B. alse
Answer» B. alse
Discussion
27.

Referring to the bellow figure, determine the voltage level that the output will reach during the pulse.

A. V
B. 5 V
C. .3 V
D. .45 V
Answer» E.
Discussion
28.

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. V
B. 2 V
C. .3 V
D. .56 V
Answer» E.
Discussion
29.

In an RC differentiating circuit, the output voltage is taken across the resistor.

A. rue
B. alse
Answer» B. alse
Discussion
30.

In an RL integrating circuit, the output voltage is taken across the inductor.

A. rue
B. alse
Answer» C.
Discussion
31.

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

A. s zero
B. s equal to the input voltage
C. s 63 percent of the input voltage
D. annot be determined
Answer» B. s equal to the input voltage
Discussion
32.

In an electric circuit, the reaction of a circuit to a given pulse input is known as the pulse response.

A. rue
B. alse
Answer» B. alse
Discussion
33.

In an integrator, when the pulse width of the input is much less than the transient time, the output voltage approaches the shape of the input.

A. rue
B. alse
Answer» C.
Discussion
34.

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

A. .73 V
B. 7.33 V
C. 0 V
D. .67 V
Answer» C. 0 V
Discussion
35.

If the capacitor in an integrator becomes leaky.

A. he time constant will be effectively reduced
B. he wave-shape of the output voltage across C is altered
C. he amplitude of the output is reduced
D. ll of the above
Answer» E.
Discussion
36.

In electronic systems, repetitive-pulse waveforms are encountered.

A. ore often than single pulses
B. ess often than single pulses
C. bout as often as single pulses
D. wice as often as single pulses
Answer» B. ess often than single pulses
Discussion
37.

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

A. 00 μs
B. 00 μs
C. 00 μs
D. .5 ms
Answer» E.
Discussion
38.

Referring to the give circuit, the output will.

A. ecay to zero at the end of the pulse
B. each 6 V at the end of the pulse
C. each 3.78 V at the end of the pulse
D. each 5.16 V at the end of the pulse
Answer» B. each 6 V at the end of the pulse
Discussion
39.

What is the highest frequency contained in a pulse that has a rise and fall time equal to 10 microseconds (10 μs)?

A. 5 kHz
B. .5 kHz
C. 0 kHz
D. 00 kHz
Answer» B. .5 kHz
Discussion
40.

In an RL differentiating circuit, the output voltage is taken across the resistor.

A. 1
B.
C. 1
D.
Answer» C. 1
Discussion
41.

The output of an RC integrator is taken across the

A. diode
B. capacitor
C. resistor
D. source
Answer» C. resistor
Discussion
42.

A dc component is the peak value of a pulse waveform.

A. 1
B.
Answer» C.
Discussion
43.

Referring to the above figure, determine the voltage level that the output will reach during the pulse.

A. 0 V
B. 15 V
C. 6.3 V
D. 9.45 V
Answer» E.
Discussion
44.

In electronic systems, repetitive-pulse waveforms are encountered

A. more often than single pulses
B. less often than single pulses
C. about as often as single pulses
D. twice as often as single pulses
Answer» B. less often than single pulses
Discussion
45.

What is the highest frequency contained in a pulse that has a rise and fall time equal to 10 microseconds (10 s)?

A. 35 kHz
B. 3.5 kHz
C. 10 kHz
D. 100 kHz
Answer» B. 3.5 kHz
Discussion
46.

In an RC differentiator, the capacitor

A. charges exponentially at a rate depending on the RC time constant
B. charges exponentially at a rate depending on the input voltage
C. charges when the input voltage is decreasing
D. charges to approximately one time constant
Answer» B. charges exponentially at a rate depending on the input voltage
Discussion
47.

Referring to Problem 7, how much will the capacitor charge if the pulse width is increased to 12 ms?

A. 2.51 V
B. 25.14 V
C. 4.86 V
D. 12.76 V
Answer» C. 4.86 V
Discussion
48.

An RC differentiator acts as a

A. low-pass filter
B. high-pass filter
C. band-pass filter
D. band-stop filter
Answer» C. band-pass filter
Discussion
49.

If the RC time constant of an integrator is increased, as the time constant is increased

A. the capacitor charges more during a pulse and discharges less between pulses
B. the capacitor charges less during a pulse and discharges more between pulses
C. the capacitor charges more during a pulse and discharges more between pulses
D. the capacitor charges less during a pulse and discharges less between pulses
Answer» E.
Discussion
50.

The output of an RC integrator is taken across the

A. diode
B. capacitor
C. resistor
D. source
Answer» C. resistor
Discussion