Physics 9702/52 — May/June 2013

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 is investigating how the peak alternating current $I_0$ varies with frequency $f$ in a circuit containing a coil of wire.

It is suggested that

\left(\frac{V_0}{I_0}\right)^2 = R^2 + 4\pi^2f^2L^2

where $R$ is the resistance of the coil, $V_0$ is the peak voltage and $L$ is a constant.

Design a laboratory experiment to test the relationship between $I_0$ and $f$ and determine a value for $L$ . 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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