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1.7 Energy, work and power

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Question 197
a.

State the principle of conservation of energy.

[1]
b.

A small hydroelectric power station has a maximum output power of 2.4 MW2.4\text{ MW}2.4 MW. This power station operates at maximum power for 5.0 h5.0\text{ h}5.0 h.

Define the unit kilowatt-hour (kWh\text{kWh}kWh).

[1]
c.

Calculate the energy produced by the power station operating at maximum power for 5.0 h5.0\text{ h}5.0 h. Give your answer in kWh\text{kWh}kWh.

[2]
d.

Radiation from the Sun is the original source of energy for many energy resources.

State two energy resources whose source is not radiation from the Sun.

[2]
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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