A step‑down transformer supplies a $240$ V, $2$ A load. The primary is connected to a $480$ V source and the transformer operates at $90\%$ efficiency. Determine (i) the turns ratio $N_{p}:N_{s}$ and (ii) the total copper loss in the windings (in watts, to one decimal place).

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Accepted Answer

Turns ratio = 2:1; Copper loss = 53.3 W

City Guilds Model Questions Vol1 2020 Engineering Question 44

A step‑down transformer supplies a \(240\) V, \(2\) A load. The primary is connected to a \(480\) V source and the transformer operates at \(90\%\) efficiency. Determine (i) the turns ratio \(N_{p}:N_{s}\) and (ii) the total copper loss in the windings (in watts, to one decimal place).

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City Guilds Model Questions Vol1 2020 Engineering Question 44

A step‑down transformer supplies a \(240\) V, \(2\) A load. The primary is connected to a \(480\) V source and the transformer operates at \(90\%\) efficiency. Determine (i) the turns ratio \(N_{p}:N_{s}\) and (ii) the total copper loss in the windings (in watts, to one decimal place).

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About This Question

Master the Exam!

A step‑down transformer supplies a \(240\) V, \(2\) A load. The primary is connected to a \(480\) V source and the transformer operates at \(90\%\) efficiency. Determine (i) the turns ratio \(N_{p}:N_{s}\) and (ii) the total copper loss in the windings (in watts, to one decimal place).