Basic Electrical Engineering (3110005) MCQs

MCQs of DC Circuits

Showing 1 to 10 out of 137 Questions
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