1) A square current-carrying loop is changed to a circular loop in time t1. Then A) emf is induced in loop for time $t < t_{1}$ B) emf is induced in loop for time $t > t_{1}$ C) no emf is induced in loop during whole process D) emf is induced due to change in magnetic field Answer: Option AExplanation:For the time t < t1 , area of loop changes Hence, magnetic flux linked with it changes during this time and emf induced thereby
