A flexible wire bent in the form of a circle is placed in a uniform magnetic field…
Physics · JEE Main · NTA Exams — Electromagnetic Induction and Alternating Currents
A flexible wire bent in the form of a circle is placed in a uniform magnetic 
field perpendicular to the plane of the coil. The radius of the coil changes with time as shown figure. The induced emf in the coil is :
field perpendicular to the plane of the coil. The radius of the coil changes with time as shown figure. The induced emf in the coil is :
Answer
(B)
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