Prior to about 1960, magnetic field strength was measured by means of a rotating coil gaussmeter. This device used a small loop of many turns rotating on an axis perpendicular to the magnetic field at fairly high speed and connected to an ac voltmeter by means of slip rings like those shown in Figure. The sensing coil for a rotating coil gaussmeter has 400 turns and an area of 1.4 cm2. The coil rotates at 180 rpm. If the magnetic field strength is 0.45 T, find the maximum induced emf in the coil and the orientation of the coil relative to the field for which this maximum induced emfoccurs.

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N turns b- B