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Physics 15 Online
OpenStudy (anonymous):

How much heat will an instrument of 12W produce in one minute if it is connected to a battery of 12V? Please do explain about the formula involved in finding the answer. Thanks

OpenStudy (john_es):

You should apply the well known formula that relates power, time and work. The work done, in joules, is just the heat produced. \[W=P\cdot t\] The 12 V data is just included in the power symbol, P.

OpenStudy (mrnood):

The voltage is not relevant in this case. Power - which is measured in Watts measure the 'rate of expenditure of energy' 1 watt = 1 joule/second So to work out the the energy : energy = Power x time @John_ES - the 12 V is not included in the power. You could get 12W from any combination of Voltage and Current. It is not relevant to this question.

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