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CAIE IGCSE Physics 4.5.4.3 Direction of the Force on Beams of Questions

Learn how magnetic fields deflect alpha particles and electrons, including the effect of charge sign and motion.

Syllabus
2026–2028
Course
Physics 0625

Exam points

  • determine when a moving charged particle experiences a magnetic force
  • predict the deflection direction of alpha particles and electrons in a magnetic field
  • explain how particle charge, motion direction and magnetic-field direction determine force direction

CAIE IGCSE Physics 4.5.4.3 Direction of the Force on Beams of Questions question 1

[Maximum number: 2]

Fig. 7.1 shows a small plotting compass which is aligned with the magnetic field between magnetic poles A and B of a U-shaped magnet.

Fig. 7.1

Fig. 7.1

Fig. 7.3 shows a β\beta-particle moving in the direction of the arrow between the same two poles.

Fig. 7.3

Fig. 7.3

On Fig. 7.3, draw an arrow to show the direction of the force on the β\beta-particle due to the magnetic field.
[Total: 5]

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