A four-pole alternator has a uniform magnetic flux density of 0,5T. A square coil with 200 turns and sides of 18cm is rotated at 20r/s inside the field. Determine the frequency of the generated emf
To determine the frequency of the generated emf, we can use the formula:
f = N * B * A * w / 2
Where:
f = frequency of the generated emf
N = number of turns in the coil (200 turns)
B = magnetic flux density (0.5 T)
A = area of the coil (18 cm * 18 cm = 324 cm^2 = 0.0324 m^2)
w = angular velocity (20 rad/s)
Substituting the given values into the formula, we get:
f = 200 * 0.5 T * 0.0324 m^2 * 20 rad/s / 2
f = 6.48 Hz
Therefore, the frequency of the generated emf is 6.48 Hz.