A loop of wire is at the edge of a region of space containing a uniform magnetic

Question

A loop of wire is at the edge of a region of space containing a uniform magnetic field B_vec. The plane of the loop is perpendicular to the magnetic field. Now the loop is pulled out of this region in such a way that the area A of the coil inside the magnetic field region is decreasing at the constant rate c. That is, rac{dA}{dt} = - c, with c > 0.

The induced emf in the loop is measured to be V. What is the magnitude B of the magnetic field that the loop was in?
Express your answer in terms of some or all of the variables A, c, and V.

Explanation / Answer

The correct answer for part A is B=V/c

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