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A transformer supplies 15V from a 220V mains. If the transformer takes 0.7A from the...

A transformer supplies 15V from a 220V mains. If the transformer takes 0.7A from the mains. When use to light 3 lamps connected in parallel and each is rated 15V,40W. Calculate
1.Efficiency
2. cost of using for 24 hrs at 30kwhr?
In Physics
2 Answers Available
Asked by Abdulbasit on 12th February, 2024
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