Electricity

Why is electrical wire made from metal?

• to insulate electricity

• to conduct electricity

• because it bends easily

• because metal is cheap

Why is there plastic coating around a metal wire?

• to keep the wire warm

• to insulate electricity

• so it looks nice

• to conduct electricity

If you added an extra battery to a circuit with a bulb, what would happen to the bulb?

• become dimmer

• no change

• become brighter

• turn off

What does this sign mean?

• electricity is dangerous

• lightning nearby

• requires batteries

• requires mains power

What does this symbol represent?

• a buzzer

• a cell

• a bulb

• two cells

What does this symbol represent?

• a bulb

• a switch (on)

• a buzzer

• a cell

Look at this diagram. What is wrong with the circuit?

• too many cells

• nothing is wrong

• too many bulbs

• a gap in the circuit

Look at this diagram. Which bulb will light up?

• only bulb A

• neither

• both

• only bulb B

Which of these is the correct symbol for a bulb?

• 
• 
• 
• 

Which of these use mains electricity?

• Hairdryer

• TV remote control

• Toaster

• Mobile Phone

• Television