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


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