A conducting square loop is placed in a magnetic field with its plane perpendicular…

PHYSICS · Single correct · CBSE · Physics · Electromagnetic Induction · Electromagnetic Induction

Problem

A conducting square loop is placed in a magnetic field

B

with its plane perpendicular to the field. The sides of the loop start shrinking at a constant rate

\alpha

. The induced emf in the loop when its side is

a

is (a)

2a\alpha B

(b)

a^2\alpha B

(c)

2a^2\alpha B

(d)

a\alpha B