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The laws of classical electromagnetics can be summarized into a concise collection called Maxwell's equations.
In point form, the first of Maxwell’s equations, called Gauss’ law (electric), is a similar expression for the electric field , but its divergence is not zero,
----------------------- [4285a]
where,
ρ -- Charge
ε0 -- Permittivity of of vacuum, 8.854 × 10−12
farad/m
The second of Maxwell’s equations, called Gauss’ law (magnetic),
comes directly out of the quantum mechanical description, given by,
----------------------- [4285b]
where,
-- Magnetic field
The third of Maxwell’s equations, called Faraday’s law, is given by,
----------------------- [4285c]
The fourth of Maxwell’s equations, called Ampère-Maxwell law, is a similar expression for the curl of the magnetic field, given by,
----------------------- [4285d]
where,
c -- = 3 × 108 m/s (the speed of light)
µ0 -- permeability of vacuum, 4π × 10−7 henry/m
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