Electric and Magnetic Fields

noahtattersall's version from 2015-04-19 18:16


Question Answer
Electric field strength (E)Force per unit charge E=F/Q (NC-1)
CapacitanceThe amount of charge stored per volt C=Q/V
Electrical energyCharge x Potential Difference
Magnetic fieldA region where a force is exerted on a magnetic material
Magnetic field strength or magnetic flux density (B)The strength of a magnetic field per unit area (Teslas)
Magnetic flux (Φ)Magnetic field x area Φ=BA (Weber, Wb)
Flux Linkage (Φ)Magnetic field x area x number of turns on the coil Φ=NΦ=BAN (Weber, Wb)
Faradays LawThe induced e.m.f. is directly proportional to the rate of change of flux linkage
Lenz’s LawThe induced e.m.f. is always in such a direction to oppose the change that caused it
Induced e.m.f. (ε)ε=-d(NΦ)/dt
Electronvolt (eV)The kinetic energy carried by an electron after it has been accelerated through a potential difference of 1 volt