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InterviewSolution
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You are given a resistance wire of length 50 cm and a battery of negligible resistance. In which of the following cases is the largest amount of heat generated:A. when only half of the wire is connected to the battery. B. when the wire is divided into four equal parts and all the four parts are connected in parallel. C. when the wire is divided into two equal parts and both the parts are connected in parallel. D. when the wire is connected to the battery directly. |
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Answer» Heat generated in an element is given by H = \(\frac{V^2}{R}\,t\) For largest amount of heat generation, R must be smallest and R is smallest in parallel connection. |
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