G485

Created by: frankyelizabeth
Created on: 14-04-16 10:43

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: 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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Tesla

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

Force per unit positive charge

Back

Electric Field Strength

Card 3

Front

Back

Card 4

Front

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.

Back

Card 5

Front

The product of magnetic flux density, B and the projection of area, A onto a surface at right angles to the flux. Unit = Weber

Back

View more cards

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