GCSE Questions: Energy Sources

Q10. Xander investigated how the output voltage of a model wind turbine was affected by the number of turbine blades. The equipment he used is shown below:

(a) Suggest two factors, other than the number of turbine blades, that will affect the output voltage of the model wind turbine.

[2 marks]

(b) Some of Xander's results are shown in the graph below:

(i) Plot his remaining results using the data from this table.

[2 marks]

Number of turbine blades
Output Voltage /volts


(ii) The output voltage for 6 turbine blades is lower than expected. The low value was caused by a measurement error.

State the name of this type of measurement error.

[1 mark]

(iii) What two conclusions can be made from Xander's results as the number of blades is increased from 1 to 4?

[2 marks]

(c) Commercial wind turbines can be manufactured with a number of blades between 2 and 8.

Suggest two factors that manufacturers would need to consider when designing and constructing commercial wind turbines.

[2 marks]

(Total 9 marks)