A wire of length L and three identical cells of negligible internal resistances are…
Physics · JEE Advanced · NTA Exams — Current Electricity
A wire of length L and three identical cells of negligible internal resistances are connected in series. Due to the current, the temperature of the wire is raised by ΔT in a time t. A N number of similar cells are 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 ΔT in the same time t. The value of N is
- 4
- 6
- 8
- 9 .
Answer
(C) 8
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