Sunday, July 13, 2008

Electromagnetic Waves - Laws

Revision notes

Maxwell’s displacement current

Maxwell generalised Ampere’s law to

B.dl = µ0(i + id)

id = ε0*(d ΦE/dt)


ΦE/ = the flux of the electric field through the area bounded by the closed curve along which the circulation of B is calculated.

Maxwell termed id as displacement current

Maxwell’s Equations

Gauss’s laws for electricity and magnetism, Faraday’s law and Ampere’s are collectively known as Maxwell’s equations

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