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4.2.5 Electrical energy and electrical power

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Question 9
a.

Describe how a wind turbine generates electrical power from the wind.

[3]
b.

The electrical power output of a wind turbine is 900 kW900\text{ kW}900 kW. The output current is 720 A720\text{ A}720 A.

Calculate the output voltage of the wind turbine.

[3]
c.

For transmission, the output voltage is increased to 275 kV275\text{ kV}275 kV.

State two advantages of transmitting electrical power at high voltage.

[2]
Markscheme

4.2.5 Electrical energy and electrical power Questions

  1. IGCSE
  2. /Physics
  3. /4.2.5 Electrical energy and electrical power

69 exam-style questions on CIE IGCSE Physics 4.2.5 Electrical energy and electrical power. Each one has a worked solution and a mark scheme showing where the marks go.

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