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A railway compartment is lit up by thirteen lamps each taking `2.1` amp at 15 volts. The heat generated per second in each lamp will be

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A railway compartment is lit up by thirteen lamps each taking `2.1` amp at 15 volts. The heat generated per second in each lamp will be
A. `4.35` cal
B. `5.73` cal
C. `7.5` cal
D. `2.5` cal
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Correct Answer - C
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