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IB Physics SL A 2 12 Field Forces Questions

Practise IB Physics SL A.2.12 by identifying field forces and distinguishing how gravitational, electric and magnetic fields act on particles.

Syllabus
First assessment 2025
Course
Physics SL
Level
SL

Exam points

  • Identify whether a gravitational, electric or magnetic field can exert a force on a particle from its mass, charge, velocity and field direction.
  • Compare electric and magnetic force contributions for moving charges in different reference frames.
  • Recognise gravitational force as the centripetal force in an orbit and calculate it or field strength with GM/r².
  • Explain why field models are needed to describe forces acting at a distance.

Learn this topic

Study A.2.12—Field forces conceptsOpen the corresponding Concept lesson for explanations, examples and exam connections.

IB Physics SL A 2 12 Field Forces Questions question 1

[Maximum number: 1]

A planet is in a circular orbit around a star. The speed of the planet is constant.

State the nature of this centripetal force.

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