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8 marksMagnetic Forces

CAPE Physics Unit 2 · 2005 · Paper 2 · Question 5(a)

Questions on the Hall effect and charged particles in magnetic and electric fields.

Explain the origin of the Hall effect, including a diagram showing clearly the directions of the Hall voltage and other relevant quantities for a specimen in which electron conduction predominates.

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Other parts of this question

  1. 5(b)A Hall probe gives a Hall voltage of 130 mV in a known magnetic field of 15 mT. Calculate the unknown magnetic field strength when the probe measures 1170 mV.[2 marks]
  2. 5(c)(i)Draw a labelled diagram to show the relationship between the two fields.[2 marks]
  3. 5(c)(ii)Write equations for the forces on the ions caused by the electric field and the magnetic field and hence calculate the electric field strength E.[3 marks]
  4. 5(d)Calculate the velocity, v, of the strip.[5 marks]

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