circuit (symbols,dimmer and brighter)

Electricity

charges move in a wire the way water flows in a river.

Current electricity

Or

Electric current

The flow of electrical charges is known as:

What gives us current electricity?

Think ! Will this bulb light ?

What is missing?

A battery ( power source )

Think ! Will this bulb light ?

What is missing?A wire ( connector )

Think ! Will this bulb light ?

What is missing?

A bulb ( load )

circuit

The path which electric current flows

Power source

cell

battery

Load

buzzer

motor

Bulb or lamp

Connector

wire

Power source Load Connector

wire cell

battery

buzzer

motor

bulb

From where does the current flow? From the (-) or (+) ?

Incomplete circuit

open circuit

broken circuit

complete circuit

closed circuit

unbroken circuit

What is the switch used for?

Closed circuit or open circuit?

Closed or open circuit?

Closed or open circuit?

If I added more batteries to a circuit, what will happen to

the bulb?

The electric energy increase, so the bulb glows brighter

If I added more bulbs to a circuit?

The electric energy decrease, so the bulb glows dimmer

If I added longer wires to a circuit?

The electric energy decrease as it travels more, so the bulb glows dimmer

Symbols • We use the circuit symbol to make it

easier for us to draw a circuit.

Bulb ( off )

Wire

Switch ( off )

Switch ( on )

Buzzer

Motor

Cell

Solve extra worksheet

Draw a circuit

Draw a circuit

Draw a circuit

Draw a circuit

Draw a circuit

Draw a circuit

1 cell, 2 lamps

2 cells, 2 lamps, switch ON

1 battery, 1 bulb, switch OFF

1 cell, 1 motor

1 buzzer, 1 motor, 2 cell

1 cell, 3 buzzer

1 cell, 1 buzzer, 1 motor