CURRENT ELECTRICITY QUIZ

The flow of current in solids is due to

Nucleus

Electrons and ions

Atoms

Electrons

TRUE ANSWER : ?
YOUR ANSWER : ?

Resistance of a material always decreases if

Number of free electrons available becomes more

Temperature of material is decreased

None of these

Temperature of material is increased

TRUE ANSWER : ?
YOUR ANSWER : ?

What voltage drop will be there across a 1 kW electric heater whose resistance when hot is 40 Ω?

50 V

150 V

200 V

100 V

TRUE ANSWER : ?
YOUR ANSWER : ?

An electric filament bulb can be worked from

DC supply only

AC supply only

All of the listed here

Battery supply only

TRUE ANSWER : ?
YOUR ANSWER : ?

Voltage dependent resistors are used

To suppress surges

As heating elements

For inductive circuits

As current stabilizers

TRUE ANSWER : ?
YOUR ANSWER : ?

With rise in temperature the resistance of pure metals

Increases

Decreases

First increases and then decreases

Remains constant

TRUE ANSWER : ?
YOUR ANSWER : ?

The maximum current rating for a 10 kΩ, 0.5 W resistor is

7.07 mA

14.14 mA

28.28 mA

0.707 mA

TRUE ANSWER : ?
YOUR ANSWER : ?

SI unit of power is

Watt

Coulomb

Watt-hour

Henry

TRUE ANSWER : ?
YOUR ANSWER : ?

E. M. F. In a circuit

Increases circuit resistance

Maintains potential difference

Decrease circuit resistance

None of the listed here

TRUE ANSWER : ?
YOUR ANSWER : ?

Whether circuit may be AC. or D.C. one, following is most effective in reducing the magnitude of the current.

Reactor

Capacitor

Resistor

Inductor

TRUE ANSWER : ?
YOUR ANSWER : ?

↑