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Magnetic fields (A-level only)

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Question 5

An alpha particle of mass m m\,m and charge +2e+2e+2e enters a uniform magnetic field of magnetic flux density B B\,B at right angles to the field. The particle moves with a non-relativistic speed v v\,v in a circular path of radius rrr.

What is the number of complete revolutions made by the alpha particle in one second?

A

Be2πm\frac{Be}{2\pi m}2πmBe​

B

πmBe\frac{\pi m}{Be}Beπm​

C

Beπm\frac{Be}{\pi m}πmBe​

D

2Beπm\frac{2Be}{\pi m}πm2Be​

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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