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A wire of length L and three identical c...

A wire of length L and three identical cell of negligible internal resistance are connected in series. Due to the current, the temperature of wire is raised by `Delta T` 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 wire is raised by the same amount `Delta T` in the same time t. The value of N is

A

4

B

6

C

8

D

9

Text Solution

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The correct Answer is:
B
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AAKASH SERIES-APPENDICES ( REVISION EXERCISE )-REVISION EXERCISE (CUTTENT ELECTRICITY )
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  17. A battery of internal resistance 4 Omega is connected to he network of...

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