Power and efficiency

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Question 17
Easy
a.

A laptop has a power rating of 0.15 kW0.15\text{ kW}0.15 kW.

Calculate the energy transferred, in kWh\text{kWh}kWh, if the laptop is switched on for 6 hours6\text{ hours}6 hours.

[2]
b.

A camping light works with a 9.0 V9.0\text{ V}9.0 V battery. It has a current of 1.45 A1.45\text{ A}1.45 A.

Calculate the power rating of the camping light.

[2]

Power and efficiency Questions

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