Explore topic-wise MCQs in Alternating Current and Voltage .

This section includes 22 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 power in the given circuit?

A. 3.92 kW
B. 280 W
C. 28.6 W
D. 9.8 W
Answer» E.
Discussion
2.

What is the resistor value in the given circuit?

A. 200
B. 1 k
C. 2 k
D. 4 k
Answer» D. 4 k
Discussion
3.

If the voltage in the given circuit was cut in half, what would the current equal?

A. 10 mA
B. 30 mA
C. 60 mA
D. 90 mA
Answer» C. 60 mA
Discussion
4.

The power rating for the resistor in the given circuit should be at least ______.

A. 1/4 W
B. 1/2 W
C. 1 W
D. 2 W
Answer» E.
Discussion
5.

The power rating for the resistor in the given circuit should be at least ___.

A. 1/4 W
B. 1/2 W
C. 1 W
D. 2 W
Answer» C. 1 W
Discussion
6.

The voltage supplying the current in the given circuit is _____.

A. 2.5 V
B. 25 V
C. 250 V
D. 2.5 kV
Answer» C. 250 V
Discussion
7.

If 750 µA is flowing through 11 k of resistance, what is the voltage drop across the resistor?

A. 8.25 V
B. 82.5 V
C. 14.6 V
D. 146 V
Answer» B. 82.5 V
Discussion
8.

Four amperes of current are measured through a 24 resistor connected across a voltage source. How much voltage does the source produce?

A. 960 V
B. 9.6 V
C. 96 V
D. 8 V
Answer» D. 8 V
Discussion
9.

A current of 200 µA through a 6.8 k resistor produces a voltage drop of

A. 34.4 V
B. 340 V
C. 13.6 V
D. 1.36 V
Answer» E.
Discussion
10.

What electromotive force would cause 20 A of current to flow through a 500 resistor?

A. 0.04 V
B. 2.5 V
C. 25.0 V
D. 10,000 V
Answer» E.
Discussion
11.

What is the approximate filament resistance of a light bulb if it operates from a 110 V source and 0.6 A of current is flowing?

A. 183
B. 18.3
C. 66
D. 6.6
Answer» B. 18.3
Discussion
12.

Approximately how much current flows through a 3.3 M resistor across a 30 V source?

A. 9 A
B. 90 A
C. 900 A
D. 9000 A
Answer» B. 90 A
Discussion
13.

When 12 V are applied across a 68 resistor, the current is

A. 816 mA
B. 17.6 mA
C. 176 mA
D. 8.16 mA
Answer» D. 8.16 mA
Discussion
14.

Four amperes of current are measured through a 24 resistor connected across a voltage source. How much voltage does the source produce?

A. 960 V
B. 9.6 V
C. 96 V
D. 8 V
Answer» D. 8 V
Discussion
15.

A current of 200 µA through a 6.8 k resistor produces a voltage drop of

A. 34.4 V
B. 340 V
C. 13.6 V
D. 1.36 V
Answer» E.
Discussion
16.

How much current is produced by a voltage of 18 kV across a 15 k resistance?

A. 1.2 A
B. 12 A
C. 120 mA
D. 12 mA
Answer» B. 12 A
Discussion
17.

If you wish to increase the amount of current in a resistor from 120 mA to 160 mA by changing the 24 V source, what should the new voltage setting be?

A. 8 V
B. 320 V
C. 3.2 V
D. 32 V
Answer» E.
Discussion
18.

The current through a flashlight bulb is 40 mA and the total battery voltage is 4.5 V. The resistance of the bulb is approximately

A. 112
B. 11.2
C. 1.2
D. 18
Answer» B. 11.2
Discussion
19.

How much voltage is needed to produce 2.5 A of current through a 200 resistor?

A. 50 V
B. 500 V
C. 80 V
D. 8 V
Answer» C. 80 V
Discussion
20.

What is the approximate resistance setting of a rheostat in which 650 mA of current flows with a 150 V source?

A. 9.7
B. 97
C. 23
D. 230
Answer» E.
Discussion
21.

What is the voltage source for a circuit carrying 2 A of current through a 36 resistor?

A. 1.8 V
B. 18 V
C. 7.2 V
D. 72 V
Answer» E.
Discussion
22.

If 750 µA is flowing through 11 k of resistance, what is the voltage drop across the resistor?

A. 8.25 V
B. 82.5 V
C. 14.6 V
D. 146 V
Answer» B. 82.5 V
Discussion