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An electric lamp of 18A, 60W is connected across a battery of 10V. If the lamp gives out 7.5 Js for giving out light, What is the percentage of energy that the lamp transforms to light? |
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Answer» An electric lamp of 18A, 60W is connected across a battery of 10V. If the lamp gives out 7.5 Js for giving out light, What is the percentage of energy that the lamp transforms to light? |
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