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Magnetic fields (A-level only)

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Question 18

A direct current $I$ dissipates thermal power $P$ in a calibration resistor of resistance $R$ .

In a second setup, an alternating current with a peak current of $3 I$ is passed through a different resistor of resistance $23R\frac{2}{3}R$ .

What is the average power dissipated in this second resistor?

$P$

$3 P$

$92P\frac{9}{2}P$

$6 P$

Markscheme

Magnetic fields (A-level only) Questions

A Level
Physics
Magnetic fields (A-level only)

66 exam-style questions on AQA A Level Physics Magnetic fields (A-level only), covering Magnetic flux density (A-level only), Moving charges in a magnetic field (A-level only), Magnetic flux and flux linkage (A-level only), Electromagnetic induction (A-level only), Alternating currents (A-level only), and The operation of a transformer (A-level only). Each one has a worked solution and a mark scheme showing where the marks go.

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