Question

Distinguish between AC generator and DC generator.
(Give four points for each)

#BeBrainly

Answer 1

When there is a change in magnetic flux linkage through a conducting loop, an emf is developed as per the Farady’s Law of Electromagnetic Induction.Generators use Electromagnetic Induction to convert mechanical energy into electrical energy. In an AC, or alternating current, Generator, the electrical current periodically reverses its direction. With a DC, or direct current, Generator, the current flows only in one direction.

The major difference between an AC Generator and a DC Generator is that the DC Generator requires a mechanism to provide a DC output. This can be done mechanically with a commutator or electronically with a rectifier. Internally, all generators produce an alternating voltage.

There are several other primary differences between AC and DC generators. Some of them are listed below.

Both AC and DC generators produce currents using electromagnetic induction. In AC generators, the coil through which the current flows is fixed, and the magnet is moving. The magnet’s north and south poles cause the current to flow in opposite directions, producing alternating current.With DC generators, the coil through which the current flows rotates in a fixed field. The two ends of the coil attach to a commutator, different halves of a single, rotating split ring. Metal brushes connect these split rings to an external circuit. The commutator balances the charges leaving and returning to the generator, resulting in a current that does not change direction.