Electricity And Circuits

If we join two terminals of electric cell directly through a wire, the chemical in an electric cell get used up very fast and the cell will stop working.

Arrangement that provides a complete path for electricity to pass (current to flow) is known as electric circuit.

When the terminals of the bulb are connected with that of electric cell by wires, a current pass through the filament of the bulb and it makes the bulb glow.

An electric bulb may get fused due to break in its filament. A break in the filament of bulb means break in the path of current between the terminals of electric cell.

Rubbers and plastic are used to cover electric wires and plug tops because they are insulators and do not allow electric current to pass when we touch plugs and switches.

Because distilled water acts as an insulator as it is purest water. Whereas tap water has salts and impurities and acts as a conductor.

Because they are insulators and avoid direct contact with electric current while touching electric wires.

Components of electric circuit can be following:

1. A cell or a battery
2. Connecting wires made of copper or aluminium
3. Switch
4. Bulb or other electric device

Yes, bulb will glow because current will flow from two terminals of the bulb.

It is a simple device that either breaks the circuit or completes it. For example-in a microwave or toy cars we have switches to turn it ON or OFF.

An electric cell is a device that converts chemical energy into electrical energy. It has two metal plates indicating two terminals-negative and positive. It has chemical inside it.

1. False
2. True
3. True
4. True.

Because the switch is ON and therefore current will flow.

Conductor-coin, needle, key, iron nail
Insulator-eraser, glass, pencil, plastic scale