Which one of the following changes will NOT alter the peak value of the alternating emf obtained from a single-phase coil generator, if all other parameters remain unchanged?
(a) Increasing the magnetic flux density between the poles
(b) Changing the shape of the coil from square to circular while keeping its area the same
(c) Increasing the angular speed of rotation of the coil
(d) Increasing the number of turns of the coil