Question

Write the principle of working of an ac generator. Draw its labelled diagram and explain its working.

Answer 1

AC Generator Working Principle:

An AC generator operates based on electromagnetic induction. As per Faraday's law, rotating a conductor within a magnetic field induces an electromotive force (emf). The alternating direction of this induced emf as the conductor rotates results in an alternating current (AC).

The generator's voltage output is contingent upon:

• Rotation speed,
• Magnetic field strength, and
• Coil turns count.

The operational mechanism is as follows:

• A wire coil rotates within a magnetic field.
• As the coil intersects magnetic flux lines, an emf is induced, driving current flow.
• The induced emf fluctuates with coil rotation, producing AC.
• Current direction reverses as the coil moves through different positions in the magnetic field.