Question

Dante drew a diagram of an electric generator.

Which best describes Dante’s error?
There should be a battery connected to the brushes.
There should be one brush on each slip ring.
The slip rings should be touching each other.
The magnets should be above the armature and axle.

Answer 1

There should be one brush on each slip ring.

Answer 2

Answer: There should be one brush on each slip ring.

Explanation:

A device that converts mechanical energy into electrical energy is known as an electric generator. The magnets are kept surrounding armature and axle. The armature rotates in between the magnets. This generates electric current which is detected by the ammeter.

It is based on Faraday's law - when a conductor moves in a magnetic field, an emf is induced in the conductor. Thus, a battery is not required. There should be one brush on each slip ring because the brushes must make contact with the rotating rings to supply current to the coil.