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Question 17

A domestic wind turbine has a power rating which varies from 1.5 kW1.5\text{ kW}1.5 kW to 5.0 kW5.0\text{ kW}5.0 kW.

The turbine has an electrical resistance of 16 Ω16\ \Omega16 Ω. On a particularly windy day, it generates a current of 15 A15\text{ A}15 A.

a.

Calculate the power output of the turbine on this day in kilowatts (kW\text{kW}kW).

[3]
b.

Explain why the manufacturer states a range of power ratings rather than a single value.

[1]
Markscheme

Simple circuits Questions

  1. GCSE
  2. /Physics
  3. /Simple circuits

42 exam-style questions on OCR GCSE Physics Simple circuits. Each one has a worked solution and a mark scheme showing where the marks go.

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