Some appliances are double insulated, and therefore have no earth wire connection.
Back
Card 17
Front
The thicker the wire in the fuse, the higher the fuse's rating. This is because a thinner wire cannot take such a big load as a thicker one can; the thinner one will just melt at the same voltage.
Back
Card 18
Front
What happens when an electrical charge flows through a resistor?
Back
Card 19
Front
Why are compact fluorescent lamps more efficient than filament lamps?
