Suppose the resistance of the coil in the previous problem is 25 Ω. Assume that the coil moves with uniform velocity during its removal and restoration. Find the thermal energy developed in the coil during
(a) its removal
(b) its restoration and
(c) its motion.
Given
Resistance of the coil
(a) during its removal
the emf induced in the
so the current flowing through the loop is given by
Thermal energy developed in the coil (H) during its removal in time interval Δt=0.25s is given by
Therefore, energy developed in the coil during removal is 25J
(b) during its restoration
The magnitude of emf induced in the loop ϵ =50V
so the current flowing through the loop is given by
Thermal energy developed in the coil (H) during its removal in time interval Δt=0.25s is given by
Therefore, energy developed in the coil during restoration is 25J
(c) during motion
total thermal energy developed =energy developed during removal+ energy developed during restoration
⇒
As heat energy is scalar quantity, it is algebraically added
Therefore, total energy developed in coil during its motion is 50J