9702/52/F/M/22: A student investigates a circuit containing a capacitor and a resistor as shown in Fig. 2.1. A dual‑beam oscilloscope is connected across the capacitor of capacitance C and resistor of resistance R. The oscilloscope displays two traces as shown in Fig. 2.2.
The student determines the phase difference θ between the two traces. The student repeats the experiment with different resistors. It is suggested that θ and R are related by the equation
\(\tan \theta = \dfrac{1}{2 \pi f C R}\)
where f is the frequency of the a.c. power supply.
Sample solutions for practical Paper 5 variant 2 Question 2 Feb/March 2022 Cambridge A Level Physics.
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