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3 marksMagnetic Forces

CAPE Physics Unit 2 · 2004 · Paper 2 · Question 5(b)(i)

An electron moving with velocity v perpendicular to a uniform magnetic field B directed out of the page, as shown in Figure 5.

Copy Figure 5 into your answer booklet and draw the path of the electron as it passes through the magnetic field. On the same diagram, draw the path if the electron is replaced with a proton.

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Other parts of this question

  1. 5(a)Explain, with the aid of a diagram, Fleming's Left Hand Rule.[3 marks]
  2. 5(b)(ii)Explain what work is done on the electron as it passes through the magnetic field.[2 marks]
  3. 5(b)(iii)Show that the path described by the electron in the magnetic field is a circle of radius r given by r = mv / (Be), where m is mass of electron and e is…[3 marks]
  4. 5(b)(iv)On the Figure 5 copied in your answer booklet, draw the path of the electron if the magnetic field B was reduced to half its value.[2 marks]
  5. 5(c)Determine the mass, m_x, of the second particle.[7 marks]

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