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1.7 Energy, work and power

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Question 83

An electric delivery van is charged overnight at a depot. In 6.0 hours6.0\text{ hours}6.0 hours, 140 MJ140\text{ MJ}140 MJ of energy is transferred to its battery.

What is the average power of the charger?

A

6.5 kW6.5\text{ kW}6.5 kW

B

390 kW390\text{ kW}390 kW

C

23 MW23\text{ MW}23 MW

D

840 MW840\text{ MW}840 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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