A wire of length L and 3 identical cells of negligible internal resistances are connected is series. Due to the current, the temperature of the wire is raised by ΔT in time t. N number 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 ΔT in the same time t. The value of N is :

A wire of length L and 3 identical cells of negligible internal resist

1.	A wire of length L and 3 identical cells of negligible internal resistances are connected is series. Due to the current, the temperature of the wire is raised by ΔT in time t. N number 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 ΔT in the same time t. The value of N is :
Answer» A wire of length $L$ and 3 identical cells of negligible internal resistances are connected is series. Due to the current, the temperature of the wire is raised by $Δ T$ in time $t$ . $N$ number of similar cells is now connected in series with a wire of the same material and cross section but of length $2 L$ . The temperature of the wire is raised by the same amount $Δ T$ in the same time $t$ . The value of $N$ is :

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