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Magnetic Fields

Cambridge A Level Physics (9702) · 5 topics

Concept of a magnetic field

Defining a Magnetic Field A magnetic field is a region of space where a force is exerted on: A magnetic pole (e.g., a permanent magnet) A moving electric charge…
Magnetic fields due to currents

Field Patterns around Conductors Using the Right-Hand Grip Rule : Grip the conductor with your right hand, thumb pointing in the direction of conventional…
Force on a current-carrying conductor

The Motor Effect A current-carrying conductor placed in an external magnetic field experiences a force, provided the current is not parallel to the field.…
Force on a moving charge

Force on a Moving Charge A single charge Q moving with velocity v is equivalent to a geometric current. F = BQv sin θ Direction For a positive charge, use…
Electromagnetic induction

Magnetic Flux and Flux Linkage Magnetic Flux (Φ): product of magnetic flux density and the area perpendicular to the field. Φ = BA Unit: Weber (Wb). 1 Wb = 1 T…