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Magnetic fields (A-level only)

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Question 21

Power P P\,P is dissipated in a resistor of resistance R R\,R carrying a direct current III.

A second resistor of resistance 3R 3R\,3R carries an alternating current with peak value 2I2I2I.

What is the average power dissipated in the second resistor?

A

1.5P1.5P1.5P

B

3P3P3P

C

6P6P6P

D

12P12P12P

Markscheme

Magnetic fields (A-level only) Questions

  1. A Level
  2. /Physics
  3. /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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