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cse โ€ข paper_1 โ€ข electrodynamics

[UPSC CSE 2015] Electromagnetic Theory (Q351, 15M)

A radio station transmits electromagnetic waves isotropically with an average power of 200\,\mathrm{kW}. Determine the average magnitude of the maximum electric field at a distance of 5\,\mathrm{km} from it.

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