Out of the following which is not a poor conductor__________?

A. Cast iron
B. Copper
C. Carbon
D. Tungsten

Out of the following which is an insulating material____________?

A. Copper
B. Gold
C. Silver
D. Paper

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

A. resistance
B. reluctance
C. conductance
D. inductance

Conductance is reciprocal of____________?

A. resistance
B. inductance
C. reluctance
D. capacitance

The resistance of a conductor varies inversely as___________?

A. length
B. area of cross-section
C. temperature
D. resistivity

With rise in temperature the resistance of pure metals______________?

A. increases
B. decreases
C. first increases and then decreases
D. remains constant

With rise in temperature the resistance of semi-conductors_________________?

A. decreases
B. increases
C. first increases and then decreases
D. remains constant

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_______________?

A. 1.2 x 10~8 Q-m
B. 1.4 x 10~8 Q-m
C. 1.6 x 10″”8 Q-m
D. 1.8 x 10″8 Q-m

An instrument which detects electric current is known as_____________?

A. voltmeter
B. rheostat
C. wattmeter
D. galvanometer

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

A. 33 V
B. 66 v
C. 80 V
D. 132 V