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CSE · Paper I · Electricity & Magnetismcse-2002-subject-03-007

Scalar potential — UPSC Physics Optional CSE 2002 Paper I

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What are vector and scalar potentials for the electromagnetic field? Are they unique? Explain what are Coulomb's and Lorentz gauges. Derive the electromagnetic wave equation in Lorentz gauge and show that it is equivalent to Maxwell's equation.

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