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1.7.3 Energy resources

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Question 11

Water is held behind a dam in a hydroelectric power scheme.

a.

State the main form of energy stored in the water behind the dam.

[1]
b.

The water is released from the dam and falls a vertical height of 360 m360\text{ m}360 m at a rate of 500 kg/s500\text{ kg/s}500 kg/s.

Calculate the rate at which energy is transferred by the falling water. (Use g=10 m/s2g = 10\text{ m/s}^2g=10 m/s2)

[2]
c.

The power scheme supplies a current of 220 A220\text{ A}220 A at a voltage of 6500 V6500\text{ V}6500 V. Calculate the efficiency of the power scheme.

[3]
d.

Hydroelectric energy is a renewable form of energy.

State one disadvantage of hydroelectric power schemes.

[1]
e.

State one other renewable source of energy.

[1]
Markscheme

1.7.3 Energy resources Questions

  1. IGCSE
  2. /Physics
  3. /1.7.3 Energy resources

142 exam-style questions on CIE IGCSE Physics 1.7.3 Energy resources. Each one has a worked solution and a mark scheme showing where the marks go.

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