The Alternating Current (AC) generator
• The AC generator consists of a loop of wire rotated by an external force inside a magnetic field. • It takes in energy by work and transfers it out by electrical transmission.
The AC generator • The induced emf in the loop is:
• e max occurs when wt = 90o or 270o • This occurs when the magnetic field is in the plane of the coil and the time rate of change of flux is a maximum. • e = 0 when wt = 0o or 180o • This occurs when the magnetic field is perpendicular to the plane of the coil and the time rate of change of flux is zero.
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