ELECTROMAGNETIC INDUCTION - created from Mind Map

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Faraday's Law

Lenz's Law

production of emf across a conductor or circuit situated in a changing magnetic field

Magnetic field strength of a coils determined by the ampere turns of a coil

To induced a voltage and current within the coil

Induced voltage is proportional to the speed or velocity of the movement

The magnetic flux developed around the coil being proportional to the amount of current flowing in the coils

3 different factors voltage (emf) can be induced into the coil using just magnetism

“that a voltage is induced in a circuit whenever relative motion exists between a conductor and a magnetic field and that the magnitude of this voltage is proportional to the rate of change of the flux”

Faraday’s Motional emf Expression

Application

Increasing the number of turns of wire in the coil

Increasing the speed of the relative motion between the coil and the magnet

Increasing the strength of the magnetic field

If the conductor does not move at right angles (90°) to the magnetic field

induced e.m.f in strainght conductor moving through a magneic field.

Dynamo

Car Alternators

an induced current always flow in a direction that opposes the change in magnetic flux that causes it

Application

The induced current produced a north pole to oposite the incoming north pole

Transformer

changing the magnetic field

moving the wire

C2P9

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