(b) A rectangular coil has 200 turns and area of 30 car? is rotating anticlockwise at a constant angular speed in a uniform magnetic field of 15 mT. union Fig 5 Figure 5 shows an end-on view of the coil at a particular instant. i. State the minimum angle, in degrees, through which the coil must rotate from its posi- tion in Figure 5 for the e.m.f. to reach its maximum value. ii. Calculate the magnetic flux linkage of the coil in its current position (c) If the coil rotates from its current position to the vertical position. Once it is in this position the field changes uniformly from 15 mT to 25 mT in 30 ms. Calculate: i. the rate of change of magnetic flux in the vertical position it. the magnitude of induced emf in the vertical position