Edexcel IGCSE Physics 6.11P charged particles in magnetic fields
Practise charged-particle questions by linking field and motion directions to force, velocity change and magnetic-force strength.
- Syllabus
- First assessment 2019
- Course
- Physics 4PH1
Exam points
- Use field and motion directions to identify the force on a moving proton or nucleus.
- Explain that the force changes velocity by changing direction, not necessarily speed.
- Suggest stronger fields or faster particles to increase the magnetic force.
6.11P Charged particles in magnetic fields question 1
The diagram shows a machine that can be used to measure the speed of fast-moving protons.
The proton passes through a hole in the negatively charged plate and enters an area where there is a magnetic field.
The magnetic field exerts a force on the proton, as shown in the diagram.
This force causes the proton to follow a circular path without changing speed.
Give the direction of the magnetic field.
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