Electricity and circuits --- by RITU B.

The tiny coiled metal wire present inside the bulb is called ___

• Element

• Conductor

• Filament

• None of these

A combination of two or more electric cells is called _____

• Electric circuit

• Battery

• Terminals

• None of these

An electric bulb has ____ terminals.

• 3

• 4

• 1

• 2

_____ is an electric device which easily closes or opens an electric circuit.

• Filament

• Electric bulb

• Electric switch

• Electric cell

A material which does not allow the electricity to pass through it is _____

• Conductor

• Electric cell

• Insulator

• None of these

Electric energy is produced from the ______ within the cell.

• Chemicals

• Metals

• Terminals

• None of these

The electric current in a closed circuit always flows from the ____ terminal of the electric cell to the _____ terminal.

• Negative to positive

• Positive to negative

• Positive to positive

• None of these

Why do electricians wear gloves made of rubber?

• It is soft.

• It is waterproof.

• It is an insulator.

• It is inexpensive.

If we touch a a live wire carrying current, we get a shock. This is because our body is a/an

• conductor of electricity

• insulator of electricity

• source of electricity

• None of these

Why is a switch used in a circuit?

• To complete or break a circuit

• To save energy

• To prevent electric shocks

• To make the bulb glow easily