PH-666
Cost of electricity
Physics · Secondary 3 · Medium · Cost of electricity
A 40 W lamp is switched on for 2.5 hours each day. What is the electrical energy used in one day, in kWh?
- 0.010 kWh
- 0.10 kWh
- 1.0 kWh
- 10 kWh
Sign in to check your answer and see the hint and the worked explanation. Free on PrepLab High.