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Edexcel A-Level Physics A2 4.4.106 Force on a Moving Charge in a Magnetic Field Questions

Practise Edexcel A-Level Physics force on moving charges by applying magnetic force, field direction and charged-particle tracks.

Syllabus
Pearson Edexcel International Advanced Subsidiary/Advanced Level
Course
Physics XPH11/YPH11
Level
A2

Exam points

  • use F equals Bqv to calculate force, speed or magnetic flux density for charged particles
  • apply Fleming’s left-hand rule to decide force or magnetic-field direction
  • analyse curved particle tracks using charge sign, mass, speed and centripetal force

Edexcel A-Level Physics A2 4.4.106 Force on a Moving Charge in a Magnetic Field Questions question 1

[Maximum number: 3]

In 1932, Carl Anderson published this photograph of a track in a cloud chamber. The cloud chamber contained a lead plate. There was a magnetic field perpendicular to the plane of the track.

Figure for Question Edexcel A-Level Physics A2 4.4.106 Force on a Moving Charge in a Magnetic Field Questions question 1 — Edexcel A-Level Physics A2

The photograph shows the track of a positron from cosmic rays and is the first photographic record of the existence of an antiparticle.

Deduce the direction of the magnetic field.

Direction of magnetic field =

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