Question

In an AC generator, a coil wound over a soft iron core is called?

• A. slip ring.
• B. brush.
• C. armature.
• D. field magnet.

Answer 1

The correct option is C

armature.

Step 1: AC generator

1. An alternating current generator (AC generator) is a machine that converts mechanical energy into electrical energy.
2. Mechanical energy is supplied to the AC Generator via steam turbines, gas turbines, and combustion engines.
3. Alternating electrical power in the form of alternating voltage and current is produced.

Step 2: Components of an AC generator

1. Armature: Armature coil consists of a large number of turns of insulated copper wire wound over a soft iron core.
2. Field magnet: A powerful permanent horseshoe magnet is employed and the armature is sandwiched between the permanent magnet's two poles.
3. Brushes: The current generated in the coil is discharged via the two carbon brushes placed on the slip rings. The brushes remain stationary and do not spin with the armature coil.
4. Slip rings: The armature coil's two free ends are attached to two brass slip rings. These rings rotate in tandem with the armature coil, and their inner surfaces are insulated.

Hence, Option (C) is correct.