A semicircular conductor of radius R = 0.250 m is rotated about the axis AC at a constant rate of 120 rev/min (Fig. P31.40). A uniform magnetic field in all of the lower half of the figure is directed out of the plane of rotation and has a magnitude of 1.30 T.
(a) Calculate the maximum value of the emf induced in the conductor.
(b) What is the value of the average induced emf for each complete rotation?
(c) What If? How would the answers to (a) and (b) change if B were allowed to extend a distance R above the axis of rotation? Sketch the emf versus time
(d) When the field is as drawn in Figure P31.40 and
(e) When the field is extended as described in (c)

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