Physics 9702: CURRENT OF ELECTRICITY Topical Past Paper Questions
Cambridge AS & A Level Physics (9702) past-paper questions on CURRENT OF ELECTRICITY, free. This topic is frequently examined across 23 exam sessions. Sign in for the full topic-segregated question bank and AI worksheets.
Sample questions
A nichrome wire of cross-sectional area $ 5.7 \times 10^{-8} m^{2} $ is connected to a power supply. The potential difference (p.d.) across the wire is 230 V. The power dissipated in the wire is 1.0 kW. (a) Show that the resistance of the wire is $ 53\Omega $. [2] (b) The resisti…
A student uses a circuit containing an ammeter, a voltmeter and a cell to take measurements to determine the resistance of a length of nichrome wire. (a) (i) Define resistance. ◇◇◇◇◇◇◇◇◇◇◇◇◇◇◇◇◇◇◇◇◇◇ (ii) Draw a circuit diagram to show how the components should be connected. Use…
A wire of diameter $d$ is connected into an electric circuit. There is a current $I$ in the wire and the charge carriers have an average drift speed $v$. The wire is replaced with a new wire of the same material but with a diameter 0.5d. The current is adjusted so that the charge…
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