Electricity and circuits

For electrical energy to flow, there must be a(n) ______.

• good battery
• copper wire
• on/off switch
• closed circuit

What is filament ??

• The thin wire that gives of light is called filament

• The plastic glass cover

Who invented the light bulb ??

• George Stephenson

• Edward greige

• Walt disney

• Thomas elva edison

In an electric bulb, light is produced due to the glowing of :

• gases inside glass case of the bulb.

• the glass case of the bulb.

• the thin filament.

• the thick wires supporting the filament.

Choose the incorrect statement.

• A switch is the source of electric current in a circuit.

• A switch helps to complete or break the circuit

• When the switch is open there is an air gap between its terminals.

  Solution:

• A switch helps us to use electricity as per our requirement

In the above diagram boojho says that the bulb will glow.

• TRUE

• FALSE

Bulb glows only in

• closed circuit

• open circuit

• open circuit if bulb is not fused

• in both circuits

How many terminals are there in a dry cell?

• six

• three

• two

• One

An electrical cell has two terminals, a positive and a

A bulb has two terminals.

• True

• False