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Q.7 A wire of length L and 3 identical cells of negligibleinternal resistance are connected in series. Due to thecurrent, the temperature of the wire is raised by AT ina time t. A number N of similar cells is now connectedin series with a wire of the same material and cross-section but of length 2L. The temperature of the wire israised by the same amount AT in the time. The value of N is (a) 4. (b)6. (c)8. (d)9. ​

Answer»

ANSWER:

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Explanation:

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