# Electromagnetism

Mind Map by , created over 5 years ago

## This mind map covers the main areas in the topic of electromagnetism. These include magnetic fields, magnetic flux density, alternating current electromagnetic induction, mutual induction and self-induction.

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 Created by alex.examtime9373 over 5 years ago Copied by tatemae.honne over 5 years ago
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1 Magnetic Fields
1.1 Region of space where magnetic forces can be felt
1.2 Magnetic Field Lines
1.2.1 Indicates the direction a 'magnetic north' would travel in a magnetic field if free to do so
1.2.2 Connect the north and south pole of a magnet
2 Magnetic Flux Density (B)
2.1 Strength of the magnetic field
2.2 Vector quantity
2.3 Tesla
3 Forces in a magnetic field
3.1 Force on a current-carrying conductor in a magnetic field
3.1.1 F = IlB
3.1.1.1 F = force
3.1.1.2 I = current
3.1.1.3 l = length
3.1.1.4 B = magnetic flux density
3.1.2 When the flow of current in the conductor is perpendicular to the magnetic field
3.1.3 Direction
3.1.3.1 Fleming's left hand rule
3.2 Force on a charged particle moving through a magnetic field
3.2.1 F = qvB
3.2.1.1 q = charge
3.2.1.2 v = velocity
3.2.1.3 B = magnetic flux density
3.3 Forces between currents
3.3.1 Definition of the Ampere is based on this principle
4 Electromagnetic Induction
4.1.1 Magnitude of the induced emf is proportional to the rate of change of magnetic flux linking a circuit
4.2 Magnetic flux (Φ)
4.2.1 Φ = BA
4.2.1.1 B = magnetic flux density
4.2.1.2 A = area
4.2.2 Vector quantity
4.2.3 Weber (Wb)
4.3 Lenz's Law
4.3.1 Direction of the induced emf always opposes the charge causing it
4.4 Mutual Induction
4.4.1 Transformer
4.5 Self-induction
4.5.1 Inductor