CURRENT ELECTRICITY QUIZ

Insulators have _______ temperature co-efficient of resistance.

Positive

Zero

Negative

None of the listed here

TRUE ANSWER : ?
YOUR ANSWER : ?

A copper wire has a resistance of 10 Ω. It is stretched by one-tenth of its original length. Then its resistance will be

11 Ω

10 Ω

12.1 Ω

9 Ω

TRUE ANSWER : ?
YOUR ANSWER : ?

A copper wire is stretched so that its length is increased by 0.1 % . The change in its resistance is

0.4%

0.3%

None of the listed here

0.2%

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YOUR ANSWER : ?

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

80 V

33 V

132 V

66 V

TRUE ANSWER : ?
YOUR ANSWER : ?

Conductance is reciprocal of

Reluctance

Capacitance

Resistance

Inductance

TRUE ANSWER : ?
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Voltage dependent resistors are used

To suppress surges

As current stabilizers

As heating elements

For inductive circuits

TRUE ANSWER : ?
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Ohm's law is not applicable to

Dc circuits

Small resistors

Semi-conductors

High currents

TRUE ANSWER : ?
YOUR ANSWER : ?

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

Conductors

Inductors

Semi-conductors

Insulators

TRUE ANSWER : ?
YOUR ANSWER : ?

The thickness of insulation provided on the conductor depends on

The magnitude of voltage on the conductor

The magnitude of current flowing through it

None of the listed here

Both magnitude of voltage and current

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Constantan wire is used for making starndard resistance because it has

High specific resistance

High melting point

Low specific resistance

Negligibly small temperature co-efficient of resistance

TRUE ANSWER : ?
YOUR ANSWER : ?

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