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Particle Physics    Quantum Physics    Waves    Optics    Mechanics    Materials    Electricity    Circular Motion    Simple Harmonic Motion    Thermal Physics    Gravitational Fields    Electric Fields    Capacitors    Magnetic Fields    Electromagnetic Induction    Radioactivity    Nuclear Energy    Discovery of the Electron    Wave-Particle Duality    Special Relativity   

Magnetic Fields

Magnetic Fields and Flux

The Motor Effect states that a current wire placed at a non-zero angle to the lines of force of an external magnetic field experiences a force due to the field. Force due to the motor effect can be calculated with F = BIL. Magnetic Flux Density is the force on 1 meter of wire carrying a current of 1A at right angles to the magnetic field.

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Moving Charges in a Magnetic Field

A moving charge in a magnetic field experiences a force of F = BQv. This equation can be equated to the centripetal force equation as a magnetic field will apply a perpendicular centripetal force to a moving charged object.

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The Cyclotron

The cyclotron is a particle accelerater which utilises the circular nature of charged objects in a magnetic field. As charged objects cross the dees. an alternating voltage reverses so they are accelerated into the other dee where they are forced on a circular path by a magnetic fiels.

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