Explore topic-wise MCQs in Electrical Engineering.

This section includes 31 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.

A series circuit acts as a voltage divider.%!

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

A series circuit acts as a current divider.%!

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

Which of the following series combinations dissipates the most power when connected across a 120 V source?%!

A. One 220 Ω resistor
B. Two 220 Ω resistors
C. Three 220 Ω resistors
D. Four 220 Ω resistors
Answer» B. Two 220 ≈í¬© resistors
Discussion
4.

In a series circuit, the individual powers are additive.%!

A. True
B. False
Answer» B. False
Discussion
5.

Two 1.5 V cells are connected series opposing across two 100 Ω resistors in series. Total current flow is%!

A. 15 mA
B. 5 mA
C. 2 mA
D. 0 A
Answer» E.
Discussion
6.

A certain series circuit consists of a 1/8 W resistor, a 1/4 W resistor, and a 1/2 W resistor. The total resistance is 1200 Ω. If each resistor is operating in the circuit at its maximum power dissipation, total current flow is%!

A. 27 mA
B. 2.7 mA
C. 19 mA
D. 190 mA
Answer» B. 2.7 mA
Discussion
7.

The term 'series opposing' means that sources are in series with opposite polarities.%!

A. True
B. False
Answer» B. False
Discussion
8.

Three 680 Ω resistors are connected in series with a 470 V source. Current in the circuit is%!

A. 69 mA
B. 230 mA
C. 23 mA
D. 690 mA
Answer» C. 23 mA
Discussion
9.

When one of three series resistors is removed from a circuit and the circuit is reconnected, the current%!

A. Increases
B. Increases by one-third
C. Decreases by one-third
D. Decreases by the amount of current through the removed resistor
Answer» B. Increases by one-third
Discussion
10.

The sum of all the voltage drops around a single closed loop in a circuit is zero.%!

A. True
B. False
Answer» B. False
Discussion
11.

There are five resistors in a given series circuit and each resistor has 6 V dropped across it. The source voltage is%!

A. 6 V
B. Depends on the current flow
C. Depends on the resistor values
D. 30 V
Answer» E.
Discussion
12.

A string of five series resistors is connected across a 6 V battery. Zero voltage is measured across all resistors except R3. The voltage across R3 is%!

A. 0 V
B. 1.2 V
C. 6 V
D. 0.6 V
Answer» D. 0.6 V
Discussion
13.

A 12 V battery is connected across a series combination of 68 Ω, 47 Ω, 220 Ω, and 33 Ω. The amount of current is%!

A. 326 mA
B. 16.3 mA
C. 32.6 mA
D. 163 mA
Answer» D. 163 mA
Discussion
14.

The total resistance of a series circuit is equal to the difference between the largest and smallest value resistors.%!

A. True
B. False
Answer» C.
Discussion
15.

The voltage at one point in a circuit is always measured relative to another point.%!

A. True
B. False
Answer» B. False
Discussion
16.

A series circuit consists of three resistors with values of 120 Ω, 270 Ω, and 330 Ω. The total resistance is%!

A. Less than 120 Ω
B. The average of the values
C. 720 Ω
D. 120 Ω
Answer» D. 120 ≈í¬©
Discussion
17.

Five resistors are connected in a series and there is a current of 3 A into the first resistor. The amount of current into the second resistor is%!

A. 3 A
B. 1 A
C. 4 A
D. 0.3 A
Answer» B. 1 A
Discussion
18.

A series circuit has a 24 V source and a total resistance of 120 Ω. The current through each resistor is%!

A. 24 mA
B. 200 mA
C. 120 mA
D. 20 mA
Answer» C. 120 mA
Discussion
19.

‘Series aiding’ is a term sometimes used to describe voltage sources of the same polarity in series.%!

A. True
B. False
Answer» B. False
Discussion
20.

The total power in a certain circuit is 12 W. Each of the four equal-value series resistors making up the circuit dissipates%!

A. 12 W
B. 48 W
C. 3 W
D. 8 W
Answer» D. 8 W
Discussion
21.

Two 6 V batteries are connected series aiding across two 1.2 kΩ resistors in series. Current through each resistor is%!

A. 5 mA
B. 10 mA
C. 0 A
D. 2.5 mA
Answer» B. 10 mA
Discussion
22.

Four equal-value resistors are in series with a 12 V battery and 13.63 mA are measured. The value of each resistor is%!

A. 22 Ω
B. 220 Ω
C. 880 Ω
D. 88 Ω
Answer» C. 880 ≈í¬©
Discussion
23.

Two resistors are in series: a 5.6 kΩ resistor and a 4.7 kΩ resistor. The voltage drop across the 5.6 kΩ resistor is 10 V. The voltage across the 4.7 kΩ resistor is%!

A. 8.39 V
B. 10 V
C. 2.32 V
D. 0 V
Answer» B. 10 V
Discussion
24.

The following resistors (one each) are connected in a series circuit: 470 Ω, 680 Ω, 1 kΩ, and 1.2 kΩ. The voltage source is 20 V. Current through the 680 Ω resistor is approximately%!

A. 60 mA
B. 30 mA
C. 6 mA
D. 300 mA
Answer» D. 300 mA
Discussion
25.

All the voltage drops and the source voltage added together in a series circuit is equal to%!

A. The total of the voltage drops
B. The source voltage
C. Zero
D. The total of the source voltage and the voltage drops
Answer» D. The total of the source voltage and the voltage drops
Discussion
26.

If a 6 V and a 9 V source are connected series aiding, the total voltage is%!

A. 6 V
B. 9 V
C. 3 V
D. 15 V
Answer» E.
Discussion
27.

*/*_If a 6 V and a 9 V source are connected series aiding, the total voltage is?

A. 6 V
B. 9 V
C. 3 V
D. 15 V
Answer» E.
Discussion
28.

_ If a 24 V and a 6 V battery are series opposing, the total voltage is$?

A. 30 V
B. 24 V
C. 18 V
D. 0 V
Answer» D. 0 V
Discussion
29.

_When a fourth resistor is connected in series with three resistors, the total resistance$?

A. Increases by one-fourth
B. Increases
C. Decreases
D. Remains the same
Answer» C. Decreases
Discussion
30.

The total resistance of eight 5.6 kΩ resistors in series is$

A. 8 Ω
B. 5,600 Ω
C. 4,480 Ω
D. 44,800 Ω
Answer» E.
Discussion
31.

The total resistance of a circuit is 680 Ω. The percentage of the total voltage appearing across a 47 Ω resistor that makes up part of the total series resistance is#

A. 68 %
B. 47 %
C. 69 %
D. 6.91 %
Answer» E.
Discussion