Question

state the principle of AC genrator​

Answer 1

Answer:

AC generators work on the principle of Faraday's law of electromagnetic induction which states that electromotive force -EMF or voltage – is generated in a current-carrying conductor that cuts a uniform magnetic field.

Answer 2

Generators:

A generator is a machine that converts available mechanical energy into electrical energy. It works on the principle of Faraday’s Law of Electromagnetic Induction. Based on the output obtained, we classify generators as:

• AC Generators
• DC Generators

Construction:

• It consists of 2-poles of a magnet in order to have a uniform magnetic field.
• There is a rectangular shaped coil called an armature.
• The armature is connected to 2 sets of slip rings, which helps in maintaining contact with the brushes.
• These slip rings are attached to the carbon brushes.
• The rotational motion of armature is free as its axis is perpendicular to the magnetic field.

Principle:

It works on the principle of Faraday’s law of electromagnetic induction. Whenever a coil is rotated in a uniform magnetic field about an axis perpendicular to the field, the magnetic flux linked with coil changes and an induced emf is set up across its ends.

Working:

When the armature rotates between the poles of the magnet upon an axis perpendicular to the magnetic field, the flux linkage of the armature changes continuously. Due to this, an emf is induced in the armature. This produces an electric current that flows through the galvanometer and the slip rings and brushes. The galvanometer swings between positive and negative values. This indicates that there is an alternating current flowing through the galvanometer.

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