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" transformer is used to light a 100W an...

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

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

A transformer is used to light 100 W - 110 lamp from 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: