WorksheetsUnit 7: Electric Circuit
Total questions: 20
Worksheet time: 20mins
An electrical appliance is made up of four components. These are the:
energy source, wires, output device and mirror
energy source, string, output device and switch
energy source, wires, output device and switch
force, wires, output device and switch
Why are electrical wires covered in rubber?
To make it look pretty
To help electricity flow along the wire
To make it safe
To add more energy
What needs to be done to this circuit so that the lamp lights up?
Close the switch
Add a source and close the switch
Add another lamp
Add another lamp and a switch
Why is a battery important in an electrical circuit?
As a source of energy.
As a path for electricity to flow through.
As a connector to connect all parts of a circuit.
Why must parts of a circuit be properly connected before the bulb can light up?
To ensure that the bulb can light up.
To ensure that the battery can produce light in a closed circuit.
To ensure that electric current can flow through the closed circuit.
Look at the diagram. Why did the bulb not light up?
The bulb was fused.
The battery had not enough electric current to light up the bulb.
The switch was opened and prevented electric current from flowing through the circuit.
Look at the circuits in the diagram. In which circuit will the bulb be brighter?
Circuit C
Circuit D
Both circuits, the bulbs will have the same brightness.
State one advantage of bulbs arranged in parallel arrangement in a circuit.
When one bulb fused the other can still light up.
Reduce the amount of electric current used for both bulbs.
Both bulbs in a parallel arrangement in circuit will share the electric current produced by the battery.
Why is electrical wiring usually made from copper?
Because copper is shiny
Because copper conducts electricity
Because copper is not magnetic
Because copper insulate electricity
This is the symbol for a _____?
a wire
a switch
a battery
a single cell
This is the symbol for a _____?
Bulb
Battery
Loudspeaker
switch
A _______________ opens and closes an electric circuit.
Transformer
Switch
Source
Conductor
Brayson made the circuit shown here in his science class. What is the most likely reason that the bulb is not lit?
The bulb is cracked.
He did not use the right size battery.
He used too many pieces of wire.
He left the switch open.
Check the following output devices that uses electricity to work.
Television
Rice cooker
Bicycle
Torchlight
