What is a material that lets electricity pass through it called?
A
An electrical insulator
B
An electrical conductor
C
An electrical appliance
Next
What is a material called that does not electricity pass through it?
A
An electrical conductor
B
An electrical insulator
C
An electrical appliance
Next
Which of these materials is an electrical insulator?
A
Rubber
B
Copper
C
Aluminium
Next
Which of these materials is an electrical conductor?
A
Silver
B
Plastic
C
Cork
Next
In which circuit will the bulb glow brightest?
A
A simple circuit with two bulbs and one battery
B
A simple circuit with one bulb and one battery
C
A simple circuit with two batteries and one bulb
Next
Why is a bulb brighter if there are more batteries in the circuit?
A
There is a greater flow of electricity
B
There is less electricity flow
C
The electricity flow is the same
Next
David has a simple circuit with two bulbs and two batteries. How can he make the bulbs dimmer?
A
Remove one battery and replace it with a section of wire
B
Remove one battery and replace it with a cork
C
Remove both bulbs
Next
David has a simple circuit with one bulb and three batteries. The bulb lights but then goes out. Why?
A
Too much electricity flows through the bulb’s filament
B
The batteries go flat
C
The circuit doesn’t have enough electricity flowing around it
Next
Why is electrical wiring usually made from copper?
A
Because copper is expensive
B
Because copper is not magnetic
C
Because copper conducts electricity
Next
Why are electrical wires usually covered with plastic?
A
To make it look colourful
B
To make it safe
C
To make bulbs brighter
Next
