An emf is induced in a conducting loop of wire 1.48m long as its shape is change

Question

An emf is induced in a conducting loop of wire 1.48m long as its shape is changed from square to circular. Find the average magnitude of the induced emf if the change in shape occurs in 4.21s and the local 0.135T magnetic field is perpendicular to the plane of the loop. (answer in V) An emf is induced in a conducting loop of wire 1.48m long as its shape is changed from square to circular. Find the average magnitude of the induced emf if the change in shape occurs in 4.21s and the local 0.135T magnetic field is perpendicular to the plane of the loop. (answer in V)

Explanation / Answer

flux=B.A

so,

s=1.48/4

=0.37 m

2*pi*r=1.48

or r=0.2355 m

so EMF=BdA/dt

=1.199*10^-3 V

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