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.

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  • Created by: NumNub
  • Created on: 09-04-13 17:23

1. Electric Field Strength

  • Force per unit charge over a defined area
  • Force per unit positive charge
  • Force per unit negative charge
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2. Weber

  • One Weber is the unit of magnetic flux when a magnetic field of magnetic flux density 1 Tesla, passes at angles through an area of 1m2.
  • 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.
  • 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 1m.

3. Faradays Law of E.M. Induction

  • The magnitude of the induced e.m.f. is inversely proportional 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.
  • 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.
  • 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 inversely proportional to the rate of change of flux linkage.

4. 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.
  • 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.
  • The force between two magnets is proportional to the product of the charges and inversely proportional to the square of the distance between them.

5. Lenz's Law

  • The direction of the induced e.m.f. is such that it opposes the change causing it.
  • The direction of the induced e.m.f. is such that it is in the same direction as the change causing it.
  • The direction of the e.m.f. is such that it opposes the change causing it.
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