Question

A transformer is used to light a 200
W and 110V lamp from a 220 V
mains. If the main current is 1 amp,
the efficiency of the transformer is
approximately :
10%
30%
50%
90%​

Answer 1

Answer:

 transformer is used to light aandlamp from amains. If the main current is, the Efficiency of the transformer is approximately:

Explanation:

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