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1.7 Energy, work and power

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Question 258

A backup home battery storage system is charged during the night. In 5.0 hours5.0\text{ hours}5.0 hours, 216 MJ216\text{ MJ}216 MJ of energy is transferred to the battery.

What is the average power of the charger?

A

12 kW12\text{ kW}12 kW

B

720 kW720\text{ kW}720 kW

C

43 MW43\text{ MW}43 MW

D

1100 MW1100\text{ MW}1100 MW

Markscheme

1.7 Energy, work and power Questions

  1. IGCSE
  2. /Physics
  3. /1.7 Energy, work and power

533 exam-style questions on CIE IGCSE Physics 1.7 Energy, work and power, covering 1.7.1a Energy stores and energy transfers, 1.7.1b Conservation of energy, 1.7.1c Kinetic and gravitational potential energy, 1.7.2 Work done, 1.7.3 Energy resources, 1.7.3a Energy resources and electricity generation, 1.7.3b Nuclear fusion as an energy source, 1.7.3c Efficiency of energy transfer, and 1.7.4 Power. Each one has a worked solution and a mark scheme showing where the marks go.

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