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A single-phase transformer has 2400 turns on the primary and 600 turns on the secondary. Its...

A single-phase transformer has 2400 turns on the primary and 600 turns on the secondary. Its no-load current is 4A at a power factor of 0.25 lagging. Assuming the volt drop in the windings is negligible, calculate the primary current and power factor when the secondary current is 80A at a power factor of 0.8 lagging.

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