Electrical Engineering Mcqs Practice Test

Question 1

Which of the following statement is true both for a series and a parallel D. C.  circuit?

Accepted Answer

D. Power are additive

Question 2

Two resistors are said to be connected in series when___________?

Accepted Answer

A. same current passes in turn through both

Question 3

You have to replace 1500 Q resistor in radio. You have no 1500 Q resistor but have several 1000 Q ones which you would connect__________?

Accepted Answer

B. two in parallel and one in series

Question 4

Which of the following material has nearly zero temperature co-efficient of resistance_________?

Accepted Answer

A. Manganin

Question 5

Current velocity through a copper conductor is___________?

Accepted Answer

C. of the order of a few ^.s/m

Question 6

A current of 16 amperes divides between two branches in parallel of resistances 8 ohms and 12 ohms respectively. The current in each branch is_____________?

Accepted Answer

B. 6.4 A, 9.6 A

Question 7

Four wires of same material, the same cross-sectional area and the same length when connected in parallel give a resistance of 25 Q. If the same four wires are connected is series the effective resistance will be________?

Accepted Answer

D. 400 Ω

Question 8

The resistance of a parallel circuit consisting of two branches is 12 ohms. If the resistance of one branch is 18 ohms, what is the resistance of the other ?

Accepted Answer

B. 36 Q

Question 9

A light bulb draws 300 mA when the voltage across it is 240 V. The resistance of the light bulb is___________?

Accepted Answer

C. 800 Q

Question 10

In a circuit a 33 Q resistor carries a current of 2 A.  The voltage across the resistor is

Accepted Answer

B. 66 v

Question 11

An instrument which detects electric current is known as_____________?

Accepted Answer

D. galvanometer

Question 12

The resistance of a copper wire 200 m long is 21 Q. If its thickness (diameter) is 0.44 mm, its specific resistance is around_______________?

Accepted Answer

C. 1.6 x 10″”8 Q-m

Question 13

With rise in temperature the resistance of semi-conductors_________________?

Accepted Answer

A. decreases

Question 14

With rise in temperature the resistance of pure metals______________?

Accepted Answer

A. increases

Question 15

The resistance of a conductor varies inversely as___________?

Accepted Answer

B. area of cross-section

Question 16

Conductance is reciprocal of____________?

Accepted Answer

A. resistance

Question 17

The property of a conductor due to which it passes current is called___________?

Accepted Answer

C. conductance

Question 18

Out of the following which is an insulating material____________?

Accepted Answer

D. Paper

Question 19

Out of the following which is not a poor conductor__________?

Accepted Answer

B. Copper

Question 20

The substances which have a large number of free electrons and offer a low resistance are called____?

Accepted Answer

D. conductors