A square loop of side is held with its plane perpendicular to a uniform magnetic field

PHYSICS · Single correct · A Level · Physics · Fields and their consequences · Fields and their consequences

Problem

A square loop of side

0.20\,\text{m}

is held with its plane perpendicular to a uniform magnetic field. The field varies with time according to

B = 0.30t^{2} + 2.0t

(SI units). The magnitude of the induced emf at

t = 2.0\,\text{s}

is (a)

0.064\,\text{V}

(b)

0.208\,\text{V}

(c)

0.128\,\text{V}

(d)

0.048\,\text{V}