Class 7 electric current and its effects

Combination of 2 or more cells

• Button cell

• Battery

• Electric cell

• Truck battery

Complete circuit is also called as

• Open circuit

• Closed circuit

Current does not flow through the circuit when the circuit is in the _____________ condition.

• Closed

• No change

• Open

• All of the above

A glowing filament will be at a

• Low temperature

• High temperature

• Atmospheric temperature

• Temperature of a ice

The device used to make or break an electric circuit is

• Resistors

• Battery

• Switch

• Ammeter

Electric bulb converts electrical energy into

• sound energy

• mechanical energy

• light energy

• magnetic energy

The safety device used for electrical appliances is

• fuse

• resistance

• connecting wire

• none of these

A coil refers to

• fuse

• an electric wire

• wire twisted in the form of a circle

• none of these

To make a battery of two cells, the negative terminal of one cell is connected to the negative terminal of the other cell

• True

• False

When current is switched 'on' of a bulb it converts _______ energy into _______ energy.

• Electrical, heat

• Electrical, light

• Electrical, mechanical

• Electrical, sound