A square coil of side 10cm and 500 turns rotates at a uniform rate of 1800revmin−1 about an axis perpendicular to a uniform magnetic field of magnitude 0.25T. At t=0 the normal to the plane of the coil makes an angle of 60∘ with the field and the rotation starts in the direction that reduces this angle.
(a) Calculate the maximum value of the emf induced in the coil.
(b) Determine the instantaneous emf produced at t=2.0ms.
(c) The coil is connected to a resistance of 20Ω. Find the total charge that passes through the resistance during the first half-rotation of the coil.
a. (a)
b. (b)
c. (c)