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