Power and efficiency

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Question 12
Easy

Electrical energy transferred by an appliance can be measured in Joules (J\text{J}J).

How do you calculate this energy in Joules?

Divide power in watts by time in seconds.

Divide power in kilowatts by time in hours.

Multiply power in watts by time in seconds.

Multiply power in kilowatts by time in hours.

Power and efficiency Questions

  1. GCSE
  2. /Physics
  3. /Power and efficiency