Physics 9702/52 — October/November 2017

A flat circular coil P carrying a current produces a magnetic field. When a second coil Q is placed with its centre a distance $x$ from the centre of coil P, as shown in Fig. 1.1, an e.m.f. $V$ may be induced in coil Q.

It is suggested that $V$ is related to $x$ by the relationship

where $V_0$ and $k$ are constants.

Design a laboratory experiment to test the relationship between $V$ and $x$. Explain how your results could be used to 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

• the procedure to be followed,
• the measurements to be taken,
• the control of variables,
• the analysis of the data,
• any safety precautions to be taken.