PH-2004
Electrical power and energy
Physics · Secondary 4 · Easy · Electrical power and energy
A 230 V, 2.3 kW water heater is switched on for 20 minutes. How much electrical energy does it use, in kWh?
- 0.077 kWh
- 0.23 kWh
- 0.77 kWh
- 7.7 kWh
Sign in to check your answer and see the hint and the worked explanation. Free on PrepLab High.