What is direct current?

What is the potential of the neutral terminal?

Why are the pins of a plug made of brass?

Why must appliances with metal cases be earthed?

What is a fuse?

Why don't appliances with plastic cases need to be earthed?

What is the power, in kW, of an appliance that transfers 90000J of energy in 30 seconds?

What is the power of a mains appliance that takes a current of 10A?

How much charge flows past a particular point in a circuit when a current of 2A flows for 2 minutes?

How much energy is transferred when a charge of 200C flows through a resistor that has a potential difference across it of 230V?

Why can two-core cable be used for a hairdryer?

Why are filament bulbs very inefficient?

What is the potential difference of the mains supply?

What is the frequency of the mains supply?

What is the peak voltage of the mains supply?

What colour is the neutral wire?

What does the cover on an earth wire look like?

Why is the outer cover of a three-pin plug made of plastic?

What fuse should be used in a 500W mains heater?

What is the unit of charge?

What is a circuit breaker?

How much energy is transferred when a 2kW appliance is used for 15 second?

What is the current through a 2300W mains heater?

24000J of energy are transferred when 2000C of charge flow through a bulb.
What is the potential difference across the bulb?