Electromagnetism

Question	Answer
Electromagnetism The Metals which can have magnetic properties are: Iron steel - permanent magnet cobalt nickel	Fleming's Right-Hand grip rule Image: 5639deab-4e3e-4082-b239-b2e2d2693243 (image/jpg)
Making Electromagnets you need: Iron Core Coil of wire *Electricity How to increase the strength of an electromagnets: -Increase the current -Increase the amount of Fe -Increase the number of coils	The Motor Effect A force can act on a wire in a magnetic field when a current is passed through the wire. The size of the force can be increased by: -Increasing the current -Using a stronger magnetic Size of the force depends on its angle: -Great force = when the wire is PERPENDICULAR to the field lines. -Zero force = when the wire is PARALLEL to the field lines
Left Hand Rule Image: a661f317-0dde-48d1-91e7-8188b4bad9e4 (image/png)	Magnetic Flux Density -A measure of the STRENGTH of the magnetic field. -Magnetic Flux = the amount of field lines passing through a surface -Density = how compact something is.
Force (N) = Magnetic flux density (Tesla) X current (Amps) X length (m) F = BIL	The symbols: Force = F Magnetic flux density = B Current = I Length = L

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	Created by Aoife Warren almost 8 years ago