A wire of length and 3 identical cells of negligible internal resistances are connected in series. Due to the current, the temperature of the wire due to the current, the temperature of the wire is raised by
is a time
. A number
of similar cells is now connected in series with a wire of the same material and cross-section but of length
. The temperature of the wire is raised by the same amount
in the same time
. The value of
is
A wire of length and 3 identical cells of negligible internal resistances are connected in series. Due to the current, the temperature of the wire due to the current, the temperature of the wire is raised by
is a time
. A number
of similar cells is now connected in series with a wire of the same material and cross-section but of length
. The temperature of the wire is raised by the same amount
in the same time
. The value of
is
(b) Now, and Solving (i) and (ii), we get |