Which expression gives the magnetic flux through a circular conducting loop of radius…

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

Problem

Which expression gives the magnetic flux through a circular conducting loop of radius

r

when a uniform magnetic field of magnitude

B

is directed perpendicular to the plane of the loop? (a)

B r^{2}

(b)

\dfrac{1}{2}B\pi r^{2}

(c)

B\pi r^{2}

(d)

2\pi B r^{2}