Physics A-Level
Constant speed under a perpendicular force
What Constant speed under a perpendicular force means in Physics A-Level, as defined for OCR.
Definition of Constant speed under a perpendicular force
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Reference: OCR
Speed remains constant in the circular orbit because the magnetic force is perpendicular to velocity, so it changes direction only and does no work.
Topics that use Constant speed under a perpendicular force
- Motion of charged particles (OCR A-Level)
Related terms
- Centripetal force
- Independence of selected speed from charge and mass
- Velocity selection
- Crossed electric and magnetic fields
- Force balance on a moving charge
- Radius of a charged particle orbit
Using Constant speed under a perpendicular force in the exam
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