WorksheetsConductors and insulators
Total questions: 15
Worksheet time: 11mins
A conductor
Is usually a metal
Conducts heat
Can be a copper wire
All of the above
An insulator
Is usually a metal
Opposes electrical current meaning electric charges do not flow freely
Conducts electrical current very easily
Works by electrons jumping from atom to atom through a wire
The best insulators are
Plastic, rubber, wood, glass
Silver, air, paper, silicon
Copper, aluminium, gold, steel
Ceramic, fabric, paper clip, cork
Attached to this electrical circuit is copper. Copper is a conductor of electricity therefore the bulb should
Glow a lot brighter
Turn off immediately
Instantly get very hot, then cool down quickly
Be dimmer
What is the conductor in the picture?
Light bulb
Battery
Wires
Switch
In an open circuit, a light bulb would
Still glow because the wires can repel electricity
Remain switched off because there is a gap in the circuit
Remain switched off unless the voltage on a power pack was turned up to the maximum
Fracture due to the pressure of the electricity in the wires
Electricity passes through a conductor because
The voltage is up high enough on a power pack/battery
Of the bound outer electrons which don't move from atom to atom
Of the free outer electrons which move from atom to atom
The nuclei are negatively charged meaning their movement through a wire generates current
Why are the poles of a power line in our street made of wood?
Wood is a conductor- they stop electrical current from the power lines hitting the ground
So that during thunderstorms in winter, there isn't as much electrical current in the power line
Because electrons can move faster through wood compared to any other material
Wood is an insulator- they stop electrical current from the power lines hitting the ground
I set up a circuit as shown. Suppose I then attach a rubber tube with two alligator clips. What happens?
The light bulb will turn on, but the ammeter will give a reading of 0 A
The light bulb will not turn on and the ammeter will show a reading of 0 A because rubber is an insulator
The light bulb will turn on and the ammeter will show a reading because rubber is a conductor
The light bulb will not turn on, but the ammeter will not give a reading
A conductor
Doesn't allow electricity to pass through it
Only conducts electricity in an open circuit
Does not light up a bulb if attached to a circuit
Allows electricity to pass through it
In an insulator, electrons transfer from atom to atom to allow electricity to pass through a wire
True
False
Which of these is not an electrical insulator
Wood
Plastic
Silver
Glass
Which of the following is not an electrical conductor
Gold
Copper
Aluminium
Rubber
Why are the wires of a toaster coated in plastic?
Plastic is stronger than other materials
Plastic is a good electrical conductor
Plastic protects people from electricity because it is an insulator
Only plastic can be made into the right shape of a wire
Why is this electrician wearing gloves?
To keep himself dry
To insulate himself
To produce electricity
To create an electrical circuit
