Silver is a good electrical conductor.

# Electrical Circuits

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!

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1. Which of these materials would not be a good electrical conductor?
Most metals are excellent electrical conductors. Some metals, such as aluminium, do not conduct electricity as well as other metals
2. Why are electrical wires covered with plastic or rubber?
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
3. Besides cells, or batteries, what is another source of electrical power?
Mains electricity is the most common power source used in homes
4. What will a circuit with an open switch do?
If the switch is open then there is a break in the circuit. By closing the switch the circuit is made complete
5. A material which allows electrical current to pass through it is called what?
Metals make good conductors
6. What symbol is used in a circuit diagram to represent a bulb?
The letter M inside a circle represents a motor
7. Why might a circuit fail to work?
Dead batteries, incorrectly wired leads and breaks in the circuit are just some of the reasons why a circuit might not work
8. 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?
Unlike a series circuit, the lamps stay bright if you add more in a parallel circuit
9. With which group of items could you not build a complete circuit?
Cells, or batteries, are the source of energy in a circuit
10. What is an electrical circuit?
Electrical current flows in one direction from the negative pole of a battery around a complete circuit to the positive pole of the battery

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