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[" A transformer is used to light a "200...

[" A transformer is used to light a "200" W and "110" V lamp from a "220V" mains.If the main current is "1" amp,the efficiency of the transformer is "],[" approximately :- "],[010%],[030%]

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

A transformer is used to light a 100 W and 110 V lamp from a 220V mains. If the main current is 0.5 A , the Efficiency of the transformer is approximately:

A transformer is used to light a 100 W and 110 V lamp from a 220V mains. If the main current is 0.5 A , the Efficiency of the transformer is approximately:

A transformer is used to light a 100 W and 110 V lamp from a 220V mains. If the main current is 0.5 A , the Efficiency of the transformer is approximately: