What is the useful form of energy produced by a kettle?
  • Sound
  • Heat
  • Microwaves
  • Light
What is the useful form of energy produced by a radio-controlled car?
  • Kinetic energy
  • Radio
  • Sound
  • Heat
Which equation can be used to calculate the amount of energy transferred from a mains supply?
  • E = P x t
  • E = t⁄P
  • E = P⁄t
  • P = E x t
If a kettle uses 3 kW of power when it is switched on and is on for 2 minutes, how much energy is transferred during the period?
  • 0.1 kWh
  • 0.2 kWh
  • 0.5 kWh
  • 1 kWh
An electric cooker heating element converts electricity to heat, but what else is also produced in this process?
  • Sound
  • Light
  • Kinetic energy
  • Radio waves
What is the power of an appliance that uses 5 kWh in 15 minutes?
  • 20kW
  • 10kW
  • 5kW
  • 1.25kW
If 1 kWh of energy costs 15 pence and an appliance with a power rating of 10 kW is switched on for 20 minutes, how much will the appliance cost to run for this amount of time?
  • 25p
  • 35p
  • 50p
  • 75p
On what does the amount of energy an appliance transfers rely?
  • Time, current and voltage
  • Power and resistance
  • Time, voltage and power
  • Resistance and power
Two appliances are switched on at the same time; one appliance uses twice as much power as the other but is on for half the amount of time. Which appliance uses more energy?
  • The appliance which is switched on for the longer period of time
  • The appliance which is switched on for the shorter period of time
  • They use the same amount of power
  • It's impossible to tell
An iron, a kettle and a computer all produce what type of energy?
  • Elastic potential
  • Radio waves
  • Kinetic energy
  • Heat
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