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A wire of length L and 3 identical cells of negligible internal resistance are connected...

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A wire of length L and 3 identical cells of negligible internal resistance are connected in series Due to the current the temperature of the wire is raised by AT in a time t A number N of similar cells is now connected in series with a wire of the same material and cross section but of length 2L The temperature of the wire is raised by the same amount AT in the same time t The value of Nis A 4 mCDT H Pxt C 8 B 6 D 9 2001

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