A rectangular loop of wire, with sides a, b, lies in the first quadrant of the xy plane, with one corner at the origin as shown in figure.
In this region there is a nonuniform time-dependent magnetic field
B(x, y, t) = 8 C x y^3 t^2 k
(where C is a constant).
a) Find the magnetic flux over the loop area
b) Find the magnitude of the induced emf in the loop.