P4 Electric Circuit

P4 Electric Circuit

An electric circuits is made up of different parts

These parts are battery, switch, wires and bulb

Battery

is the sources of energy in an electric circuit.

There are positive (+ve) and negative (-ve) terminals of the battery are connected properly to other parts of the lectric circuits

Switch

to controls when an electric current can flow in an electric circuit

The electric current flows if the switch is on and stops if the switch is off

Wires

to connect one electrical part to another

Electrical wires are made of thin strips of metal

Most wires are made of copper

Bulb

produces light and heat in order for the bulb to light up, it has to be properly connected in a circuit

Bulb is made up of a:

-metal filament

-glass case

-metal casing and tip

Parts of bulb:

-Metal filament

Usually made filament is usually made of a metal called tungsten

When an electric current flows through the metal filament it glows and gives off light and heat

Glass case

the glass case covers the metal filament to prevent it from being damaged

Metal casing and tip

These parts connect the bulb to an electrical circuit

Fill in the Blanks

the bulb made up of a metal filament, ............. ............ and metal casing and tip

Multiple Choice

These are parts of electric circuit, except...

• battery

• switch

• glass

• wires

Multiple Choice

the uses of a switch is ......

• to connect one electrical part to another

• produces ight and heat

• controls when an electric current can flow in an electric circuit

Multiple Select

There are two terminals ...... and negative of the battery are connected properly to other parts of the electric circuit

• positive

• neutral

Closed circuits

A Closed circuit is one through which an electric current can flow.

There are 2 types of closed circuit:

1. Circuit A

2. Circuit B

Open Circuit

An open is one through which an electric current cannot flow.

There are 2 types of open circuit

1. Circuit C

2. Circuit D

Conductors and Insulator

Conductor is the materials that allow an electric current to pass through them

Insulator is the materials that do not allow an electric current to pass through them

Examples of Conductors

The examples of electrical conductors are steel paper clip, aluminium foil, copper coins, iron keys, steel cutlery, metal nails, aluminium can

Examples of Insulator

these are the examples of electrical insulator plastic spoon, ice cream stick, glass marble, eraser, plastic ball

Multiple Choice

Look at this picture, based on this picture this is the example of ............. circuit

• open circuit

• closed circuit

Multiple Choice

in ....... circuit the bulbs will ......... because electric current is not flowing through the circuits

• open , do not light up

• closed , light up

• open , light up

• closed , do not light up

Fill in the Blanks

Conductor is the material that can

an electric current to pass through them

Multiple Choice

These are examples of insulator materials ,except...

• Plastic ball

• steel cutlery

• ice cream stick

• plastic spoon

Multiple Select

These are the example of conductors materials

• ice cream stick

• iron keys

• plastic ball

• aluminium can