A square conducting loop has side length and lies in a uniform magnetic field of…

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

Problem

A square conducting loop has side length

0.20\,\text{m}

and lies in a uniform magnetic field of magnitude

0.30\,\text{T}

directed perpendicular to the plane of the loop. The loop expands so that each side length increases at a rate of

1.5\,\text{cm/s}

while maintaining its square shape. What is the magnitude of the induced emf at the instant the side length is

0.20\,\text{m}

? (a)

18\,\text{mV}

(b)

0.90\,\text{mV}

(c)

1.8\,\text{mV}

(d)

6.0\,\text{mV}