Electrical and Magnetic fields definitions

Physics, Fields, Particles and frontiers of Physics (G485) Definitions for Unit 1 (Electrical and Magnetic Fields) picked from a list produced by the Student room. Anyone's I've missed out, please tell me.

  • Created by: NumNub
  • Created on: 09-04-13 17:23
Coulomb's law
The force between two electric charges is proportional to the product of the charges and inversely proportional to the square of the distance between them.
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Electric Field Strength
Force per unit positive charge
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Magnetic Flux Density
A measure of the strength of a magnetic field, defined by: B/ILsinθ, where B = magnetic flux density (T), I = current in the wire (A), l = length of the wire (m), F = the force experienced (N) and θ = the angle between the wire and the field.
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Telsa
The unit of magnetic flux density, when a wire of length 1m carrying a current of 1A perpendicular to the field experiences a force of 1N.
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Magnetic Flux
The product of magnetic flux density, B and the projection of area, A onto a surface at right angles to the flux. Unit = Weber
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Weber
One Weber is the unit of magnetic flux when a magnetic field of magnetic flux density 1 Tesla, passes at right angles through an area of 1m2.
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Magnetic Flux Linkage
The product of the magnetic flux and the number of turns on the coil. Unit = Weber turns.
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Faradays Law of E.M. Induction
The magnitude of the induced e.m.f. is equal to the rate at which magnetic flux is cut. For a coil this becomes: The induced e.m.f. is equal to the rate of change of flux linkage.
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Lenz's Law
The direction of the induced e.m.f. is such that it opposes the change causing it.
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Other cards in this set

Card 2

Front

Electric Field Strength

Back

Force per unit positive charge

Card 3

Front

Magnetic Flux Density

Back

Preview of the front of card 3

Card 4

Front

Telsa

Back

Preview of the front of card 4

Card 5

Front

Magnetic Flux

Back

Preview of the front of card 5
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