Physics

Problem

A circular loop of 20 turns has its radius uniformly reduced from

10\,\text{cm}

5\,\text{cm}

0.20\,\text{s}

while it remains perpendicular to a uniform magnetic field of

0.50\,\text{T}

. What is the magnitude of the average induced emf? a)

1.57\,\text{V}

0.59\,\text{V}

1.18\,\text{V}

2.36\,\text{V}