Electrical Circuits & Devices

Question 1

What are electrical circuits?

Answer 1

systems for transferring energy from the energy source to another part of the electric circuit

Question 2

What is an electrical current?

Answer 2

it is the movement of electric charges through a conductor

Question 3

Where do electrical appliances get their energy?

Answer 3

a cell eg. a battery

Question 4

What happens when a circuit is ‘open’?

Answer 4

electricity does not flow

Question 5

What are the wires in a circuit made of?

Answer 5

copper

Question 6

Why are the wires in a circuit made of copper?

Answer 6

copper is a material that conducts electricity

Question 7

What are devices?

Answer 7

devices are man made objects eg. light bulb / buzzer / motor

Question 8

What kinds of energy do light bulbs, buzzers and motors produce?

Answer 8

light bulbs produce light energy
buzzers produce sound energy
electric motors produce movement energy

Question 9

What is the ‘light’ called from a bulb?

Answer 9

output energy

Question 10

What is the plastic layer usually covering the copper wires called?

Answer 10

insulation