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