Basic Electrical Engineering (3110005) MCQs

MCQs of DC Circuits

Showing 1 to 10 out of 137 Questions
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1.

Which of the following is not an expression of power?

(a)

P=VI
(b)

P=I2R
(c)

P=V2/R
(d)

P=I/R
Answer:

Option (d)

2.

Kilowatt-hour (kWh) is a unit of?

(a)

Current
(b)

Power
(c)

Energy
(d)

Resistance
Answer:

Option (c)

3.

Out of the following, which is not a source of electrical energy?

(a)

Solar cell
(b)

Battery
(c)

Potentiometer
(d)

Genertor
Answer:

Option (c)

4.

Materials which easily allow the passage of electric current are known as _________

(a)

Insulators
(b)

Conductors
(c)

Dielectrics
(d)

Semi-conductors
Answer:

Option (b)

5.

Which of the following statements are true with regard to resistance?

(a)

Resistance is directly proportional to a length of the wire
(b)

Resistance is directly proportional to an area of cross-section of the wire
(c)

Resistance is inversely proportional to the length of the wire
(d)

Resistance is inversely proportional to the resistivity of the wire
Answer:

Option (a)

6.

Resistivity of a wire depends on

(a)

length
(b)

material
(c)

cross sectional area
(d)

none of these
Answer:

Option (b)

7.

A circuit contains two un-equal resistances in parallel

(a)

current is same in both
(b)

large current flows in larger resistance
(c)

potential difference across each is same
(d)

smaller resistance has smaller conductance
Answer:

Option (c)

8.

The resistance of a 100 W, 200 V lamp is

(a)

100 ohm
(b)

200 ohm
(c)

400 ohm
(d)

1600 ohm
Answer:

Option (c)

9.

Ohm's law is not applicable to

(a)

DC circuits
(b)

high currents
(c)

small resistors
(d)

semi-conductors
Answer:

Option (d)

10.

A wire of resistance R has its length and cross section both doubled. Its resistance will become

(a)

4 R
(b)

2 R
(c)

R
(d)

R/4
Answer:

Option (c)

Showing 1 to 10 out of 137 Questions
1 2 3 4 5 6