Physics – 4.5.2 The a.c. generator | e-Consult

a) The period of the AC e.m.f. is 2 seconds. This is the time taken for one complete cycle of the waveform.

b) The frequency of the AC e.m.f. is 1/2 Hz. Frequency is the reciprocal of the period (f = 1/T). Therefore, f = 1/2 s^-1.

c) The position of the generator coil relative to the magnetic field directly affects the magnitude of the induced e.m.f. When the coil is aligned with the magnetic field, the e.m.f. is at its maximum. When the coil is perpendicular to the magnetic field, the e.m.f. is zero. As the coil rotates, the e.m.f. varies sinusoidally, reflecting the changing area of the loop exposed to the magnetic field. A larger number of turns in the coil will result in a larger e.m.f. for the same magnetic field and rotation speed.