Year 9 Physics Revision

What is a battery?

• switch
• power source
• insulator

A complete circuit has .......

• a motor in it
• a switch in it
• two bulbs in it
• no breaks in it

This circuit has a battery, buzzer, and switch.
When the switch is closed the buzzer will sound because -

• the switch gives energy to the battery
• the buzzer is made of special plastic
• the wires are cooled by the surrounding air
• electricity can flow in a complete path

What material would be safest to use as an insulator to cover electrical wires?

• rubber
• tin
• aluminum
• water

Which of these substances conducts electricity the best?

• wood
• brick
• copper
• plastic

This image represents what type of circuit?

• open
• closed
• series
• parallel

Will the light bulb in this circuit light and why/why not?

• yes, because it has two batteries
• no, because the switch is open
• yes, because it is in a circuit
• no, because the bulb is burned out

If bulb 1 burns out, what will occur?

• bulbs 2 and 3 will go out
• bulbs 2 and 3 receive more volts
• bulbs 2 and 3 will stay lit
• nothing will happen

What is a circuit that only has ONE path for electricity to flow?

• series circuit

• closed circuit

• parallel circuit

• light bulb

Conventionally, current is described as flowing from the ................ terminal of a battery to the ................ terminal.

• Negative.....negative

• Negative....positive

• Positive......negative

• Positive....positive