A circular loop of wire of radius a is placed in a uniform magnetic field, with the plane of the loopperpendicular to the direction of the field, as shown in Figure 2 below.x x x x x x xxX x xx x XFigure 2: Loop in Field Varying in TimeThe magnetic field varies with time according to B (1) = B, +bt , where B, and b are positive constants.(a) Calculate the magnetic flux through the loop at / = 0.(b) Calculate the induced emf in the loop.

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