The magnetic field B at all points within the colored circle shown in Fig. 29.31 has an initial magnitude of 0.750 T. (The circle could represent approximately the space inside a long, thin solenoid.) The magnetic field is directed into the plane of the diagram and is decreasing at the rate of -0.0350 T/s.(a) What is the shape of the field lines of the induced electric field shown in Fig. 29.31, within the colored circle?f between theends?

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