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

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 in series. Due to this current, the temperature of the wire is raised by ΔT 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 same amount ΔT in the same time t. Find the value of N.
Answer» A wire of length $L$ and $3$ identical cells of negligible internal resistances are connected in series. Due to this current, the temperature of the wire is raised by $Δ T$ 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 $2 L$ . The temperature of wire is raised by same amount $Δ T$ in the same time $t$ . Find the value of $N$ .

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