Physics 9702/52 — October/November 2014

Cambridge A-Level · Planning, Analysis and Evaluation · worked solutions for every part, with the mark scheme

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Topics Analysis, Conclusions and Evaluation · Planning

Q115MPlanningAnalysis, Conclusions and EvaluationFree sample

A student investigates the power dissipated by a lamp connected to a model wind turbine as shown in Fig. 1.1.

Fig. 1.1

The power $P$ dissipated in the lamp depends on the angle $\theta$ between the axis of the turbine and the direction of the wind, as shown by the top view in Fig. 1.2.

Fig. 1.2

It is suggested that

P = k \cos \theta

where $k$ is a constant.

Design a laboratory experiment to test the relationship between $P$ and $\theta$ and determine a value for $k$ . You should draw a diagram, on page 3, showing the arrangement of your equipment. In your account you should pay particular attention to

(a)

the procedure to be followed,

(b)

the measurements to be taken,

(c)

the control of variables,

(d)

the analysis of the data,

(e)

the safety precautions to be taken.

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