In my text book there was a question :
A loop(charged) is lying in a Cylindrical region with magnetic field B . if the field is turned off instantly, the find the change in angular velocity of the loop.
Now I was able to get an answer by assuming that an impulsive non conservative electric field is generated which is along the loop at all places.
But I am unable to understand why the electric field is circular ? ( and even if its circular then why along the loop only ? why not a circle with some other center ?)
As far as I know , in order to prove that an Electric field is induced we say that the induced current is developed in a wire by Faraday's law and hence an Electric field must exist. But we could have taken any other shaped conductor. Would that change the direction of induced Electric field ?
Also does the cylindrical region play any role here ?