Electrical Circuits & Devices
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What are electrical circuits?
systems for transferring energy from the energy source to another part of the electric circuit
What is an electrical current?
it is the movement of electric charges through a conductor
Where do electrical appliances get their energy?
a cell eg. a battery
What happens when a circuit is ‘open’?
electricity does not flow
What are the wires in a circuit made of?
copper
Why are the wires in a circuit made of copper?
copper is a material that conducts electricity
What are devices?
devices are man made objects eg. light bulb / buzzer / motor
What kinds of energy do light bulbs, buzzers and motors produce?
light bulbs produce light energy buzzers produce sound energy electric motors produce movement energy
What is the ‘light’ called from a bulb?
output energy
What is the plastic layer usually covering the copper wires called?
insulation