Ten identical cells connected is series are needed to heated a wire of length one meter and radius 'r'by `10^(@)C` in time t. How many cells will be required to heat the wire of length two meter of the same radius by the same temperature in time 't' ?

Ten identical cells connected in series are needed to heat a wire of length one meter and radius 'r' by 10^@C in time 't' How many cells will be required to heat the wire of lengths two meter of the same eadius bt the same temperature in time 't'?

The power dissipated when three identical cells of negligible internal resistance are connected in series with a wire of length l , is exactly equal to that , when N similar cells are coonected in series with a wire of length 2 l , of the same meterial and having the same area of cross section . Find the value of N .

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 DeltaT in time t.N number of similar cells is now connected in series with wire of the same material and cross section but of length 2L . The temperature of the wire is raised by the same amount DeltaT in the same time t. The value of N is :

A wire of length L and 3 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 number N of similar cells is now connected in series with a wire of the same material and cross-section but the length 2 L. The temperature of the wire is raised by the same amount ΔT in the same t. The value of N is

A wire of length L and 3 identical cells is now connected in series with a wire of the same material and cross-section but of length by the same amount Delta T in the same time t. the value of N is:-

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

A wire of length L and 3 identical cells of negligible internal resistance are connected in series. Due to the current, the temperature of the wire is raised by /_\T in 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 4L. The temperature of the wire is raised by same amount /_\T in same time t . The value of N is

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