A wire loop is rotated in a magnetic field. The frequency of change of direction of the induced e.m.f. is:
six times per revolution
once per revolution
twice per revolution
four times per revolution
Option 1)
six times per revolution
Incorrect option
Option 2)
once per revolution
Incorrect option
Option 3)
twice per revolution
Correct option
Option 4)
four times per revolution
Incorrect option