Explore topic-wise MCQs in Alternating Current and Voltage .

This section includes 11 Mcqs, each offering curated multiple-choice questions to sharpen your Alternating Current and Voltage knowledge and support exam preparation. Choose a topic below to get started.

1.

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

A. 100 kHz
B. 10 kHz
C. 3.5 kHz
D. 35 kHz
Answer» E.
Discussion
2.

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

A. 1.46 V
B. 14.62 V
C. 20 V
D. 0 V
Answer» C. 20 V
Discussion
3.

When a 24 V input pulse with a width equal to five time constants is applied to an RC 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
4.

In an RC 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
5.

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
6.

In an RL 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
7.

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
8.

To understand how the output voltage is shaped by a differentiator, you must consider

A. the response to the rising pulse edge
B. the response between the rising and falling edges
C. the response to the falling pulse edge
D. all of the above
Answer» E.
Discussion
9.

A steady-state condition is reached when

A. the output voltage reaches the average value of the input voltage
B. the output voltage reaches the input voltage
C. the output voltage reaches approximately 63% of the input voltage
D. the output voltage reaches the effective value of the input voltage
Answer» B. the output voltage reaches the input voltage
Discussion
10.

Referring to the give circuit, the output will

A. decay to zero at the end of the pulse
B. reach 6 V at the end of the pulse
C. reach 3.78 V at the end of the pulse
D. reach 5.16 V at the end of the pulse
Answer» B. reach 6 V at the end of the pulse
Discussion
11.

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