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Magnetic fields (A-level only)

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Question 46

A coil is rotated at a constant frequency f f\,f in a uniform magnetic field. The magnetic flux linking the coil is zero at time t1 t_1\,t1​ and the induced electromotive force (emf) in the coil is zero at time t2t_2t2​.

What is the smallest positive value of t1−t2t_1 - t_2t1​−t2​?

A

000

B

18f\frac{1}{8f}8f1​

C

14f\frac{1}{4f}4f1​

D

12f\frac{1}{2f}2f1​

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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