Question

The device used for producing electric current is called a

• A. generator
• B. galvanometer
• C. ammeter
• D. motor

Answer 1

The correct option is A

generator

Explanation in case of correct answer:

In the case of option A.

Generator:

1. It’s a device that receives mechanical energy from an external source and converts it to electrical energy.
2. It works on faradays law of electromagnetic induction.
3. They are used as alternate power supply backup and support the main supply also.
4. It consists of a stationary magnet, which produces a magnetic field, and a closed circuit coil known as an armature.
5. When this armature revolves in the magnetic field, an induced emf is produced in it according to the faradays law of electromagnetic induction.
6. The armature itself consists of a conductor coil (a copper coil tightly wound onto a metal core) that is rotated rapidly between the poles of a horseshoe-type magnet.
7. The conductor coil along with its core is known as an armature.
8. Thus, option A is the correct option.

Explanation in case of incorrect answers:

In the case of option B.

1. A galvanometer is an electric device that is used to measure a small electric current by the deflection of a moving coil.
2. Thus, option B is the incorrect option.

In the case of option C.

1. An ammeter is an instrument, which is used for measuring either direct (DC) or alternating (AC) electric current, in amperes.
2. Thus, option C is the incorrect option.

In the case of option D.

1. An electrical motor is used to convert electrical energy into mechanical energy.
2. Thus, option D is the incorrect option.

Hence, the correct option is option A.