The amount of energy an appliance transfers depends on
how long the appliance is switched on for and the power of the appliance.
Work is done when
charge flows in a circuit.
Electrical energy may be transferred by the appliance in different ways:
Kinetic energy for a motor, thermal energy in a kettle
Work done is when charge flows through a circuit, and is also equal to energy transferred, as all the electrical energy (ideally) gets transferred to the appliance
Power rating of an appliance shows the power it uses in Watts, so greater power rating means it uses more energy
