1.

A transformer is used to light a 140 W,24 V lamp from 240 V AC mains. The current in mains cable is 0.7 A, find the efficiency (approximate value) of transformer.

Answer»

A transformer is used to light a 140 W,24 V lamp from 240 V AC mains. The current in mains cable is 0.7 A, find the efficiency (approximate value) of transformer.



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