Energy transferred, kilowatt-hours and cost
E = Pt and E = QV, energy in kilowatt-hours, and working out what it costs to run an appliance.
You will be able to
- Calculate energy with E = Pt and E = QV, with the time in seconds
- Calculate energy in kWh with the power in kW and the time in hours
- Work out the cost of using an appliance from its kWh and the price
- Compare appliances by the energy they transfer
25 minutes, 8 exam-style questions.