KS2 Science Quiz - Electrical Circuits (Questions)

This KS2 Science quiz will take you on a tour of electrical circuits, looking at how they work and some of their parts - such as batteries, switches and wires.

Electrical circuits are closed paths for currents to flow and they are usually made of components joined by wires. Have you ever counted how many electrical items you have in your house? And would you remember to include those that use batteries? We have become very reliant on electrical goods since the first modern battery was invented by Allesandro Volta in 1800. At the flick of a switch we can have things our ancestors could only have dreamt of!

How much do you know about electrical circuits? Why are electric wires coated with plastic or rubber? What do switches do? What is another name for batteries? Take this quiz to find out!

1. What is an electrical circuit?
[ ] A collection of electrical equipment
[ ] A path around which electrical current flows
[ ] A series of conductors and insulators
[ ] A light bulb and battery
2. A material which allows electrical current to pass through it is called what?
[ ] An insulator
[ ] A cell
[ ] A connection
[ ] A conductor
3. With which group of items could you not build a complete circuit?
[ ] Crocodile leads, bulbs, switch, buzzer
[ ] Bulbs, crocodile leads, cell
[ ] Cell, switch, buzzer, crocodile leads
[ ] Wires, bulb, cell
4. What symbol is used in a circuit diagram to represent a bulb?
[ ] A circle
[ ] Two parallel lines: one short and one long
[ ] An X inside a circle
[ ] The letter M inside a circle
5. Which of these materials would not be a good electrical conductor?
[ ] Copper
[ ] Glass
[ ] Silver
[ ] Iron
6. Why are electrical wires covered with plastic or rubber?
[ ] Plastic and rubber are comfortable materials to touch
[ ] Smooth materials keep wires from getting tangled
[ ] Plastic and rubber are good electrical insulators
[ ] Plastic and rubber can be made in different colours so people can tell different leads apart
7. What will a circuit with an open switch do?
[ ] It will not allow electricity to pass through
[ ] It will allow electricity to pass through
[ ] It will resist electricity
[ ] It will make a good electrical insulator
8. Besides cells, or batteries, what is another source of electrical power?
[ ] Lightbulbs
[ ] Motors
[ ] Petrol
[ ] Electricity mains
9. You have made a simple circuit with one bulb. If you wanted to add an extra bulb without the first bulb dimming, what would you need to design?
[ ] A series circuit
[ ] A parallel circuit
[ ] A complex circuit
[ ] An incomplete circuit
10. Why might a circuit fail to work?
[ ] It might have a dead battery
[ ] It might have two leads connected to the positive pole of the battery and none connected to the negative
[ ] It might have a break in the circuit
[ ] All of the above

 

KS2 Science Quiz - Electrical Circuits (Answers)
1. What is an electrical circuit?
[ ] A collection of electrical equipment
[x] A path around which electrical current flows
[ ] A series of conductors and insulators
[ ] A light bulb and battery
Electrical current flows in one direction from the negative pole of a battery around a complete circuit to the positive pole of the battery
2. A material which allows electrical current to pass through it is called what?
[ ] An insulator
[ ] A cell
[ ] A connection
[x] A conductor
Metals make good conductors
3. With which group of items could you not build a complete circuit?
[x] Crocodile leads, bulbs, switch, buzzer
[ ] Bulbs, crocodile leads, cell
[ ] Cell, switch, buzzer, crocodile leads
[ ] Wires, bulb, cell
Cells, or batteries, are the source of energy in a circuit
4. What symbol is used in a circuit diagram to represent a bulb?
[ ] A circle
[ ] Two parallel lines: one short and one long
[x] An X inside a circle
[ ] The letter M inside a circle
The letter M inside a circle represents a motor
5. Which of these materials would not be a good electrical conductor?
[ ] Copper
[x] Glass
[ ] Silver
[ ] Iron
Most metals are excellent electrical conductors. Some metals, such as aluminium, do not conduct electricity as well as other metals
6. Why are electrical wires covered with plastic or rubber?
[ ] Plastic and rubber are comfortable materials to touch
[ ] Smooth materials keep wires from getting tangled
[x] Plastic and rubber are good electrical insulators
[ ] Plastic and rubber can be made in different colours so people can tell different leads apart
Covering electrical wires in insulating materials such as rubber and plastic makes the leads safe to touch - an exposed wire is extremely dangerous and should NEVER be touched
7. What will a circuit with an open switch do?
[x] It will not allow electricity to pass through
[ ] It will allow electricity to pass through
[ ] It will resist electricity
[ ] It will make a good electrical insulator
If the switch is open then there is a break in the circuit. By closing the switch the circuit is made complete
8. Besides cells, or batteries, what is another source of electrical power?
[ ] Lightbulbs
[ ] Motors
[ ] Petrol
[x] Electricity mains
Mains electricity is the most common power source used in homes
9. You have made a simple circuit with one bulb. If you wanted to add an extra bulb without the first bulb dimming, what would you need to design?
[ ] A series circuit
[x] A parallel circuit
[ ] A complex circuit
[ ] An incomplete circuit
Unlike a series circuit, the lamps stay bright if you add more in a parallel circuit
10. Why might a circuit fail to work?
[ ] It might have a dead battery
[ ] It might have two leads connected to the positive pole of the battery and none connected to the negative
[ ] It might have a break in the circuit
[x] All of the above
Dead batteries, incorrectly wired leads and breaks in the circuit are just some of the reasons why a circuit might not work