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Magnetic fields (A-level only)

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Question 45

When a proton moves at a speed vvv perpendicular to a uniform magnetic field of flux density BBB, the radius of its circular path is RRR.

A second proton moves at a speed 3v3v3v perpendicular to a uniform magnetic field of flux density 2B2B2B.

What is the radius of the path of the second proton?

A

23R\frac{2}{3}R32​R

B

32R\frac{3}{2}R23​R

C

6R6R6R

D

16R\frac{1}{6}R61​R

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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