Question

The primary resistance of a 440/110-V transformer is 0.5 Ω and the
secondary resistance is 0.04 Ω. When 440 V is applied to the primary and
secondary is left open-circuited, 200 W is drawn from the supply. Find the
secondary current which will give maximum efficiency and calculate this
efficiency for a load having unity power factor.

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Electrical Engineering

Electrical Machines

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