A transformer ia used to light a 100W and 110V lamp from a 220V mains.

1.	A transformer ia used to light a 100W and 110V lamp from a 220V mains. If the main current is 0.5amp ,the efficiency of the transformer is approx 1)10% 2)30% 3)50% 4)90%
Answer» A transformer ia used to light a 100W and 110V lamp from a 220V mains. If the main current is 0.5amp ,the efficiency of the transformer is approx 1)10% 2)30% 3)50% 4)90%

A transformer ia used to light a 100W and 110V lamp from a 220V mains. If the main current is 0.5amp ,the efficiency of the transformer is approx 1)10% 2)30% 3)50% 4)90%

Answer»

A transformer ia used to light a 100W and 110V lamp from a 220V mains. If the main current is 0.5amp ,the efficiency of the transformer is approx

1)10%

2)30%

3)50%

4)90%

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A transformer ia used to light a 100W and 110V lamp from a 220V mains. If the main current is 0.5amp ,the efficiency of the transformer is approx 1)10% 2)30% 3)50% 4)90%

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