Question

The device used for producing electric current is called
(1) Ammeter
(2) Generator
(3) Galvanometer
(4) Motor

Answer 1

In this question, we'll learn about the gadget that generates electric current, which is a generator. A mechanical energy source is converted into electrical energy by an electric generator. It is based on the electromagnetic induction principle.

Complete step-by-step solution:
Generator: A generator is a piece of mechanical machinery that converts mechanical energy to electrical energy. Generators are used in agricultural and industrial settings. The law of electromagnetic force is the most extensively used principle for the design of generators.
Generators of various sorts:
There are two different kinds of generators:-
1. AC generators: Also known as alternators, are machines that transform mechanical energy into electrical energy in the form of alternating current. The unit used to rate AC generators is kilovolt-amperes.
Working of AC generators:
A high number of turns of insulated copper wire are wound over a soft iron core in an armature coil. When the armature rotates in a magnet's magnetic field, it cuts the magnetic field lines, causing induced current to flow to the coil. The direction of induced current is determined by Fleming’s right hand rule.
2. DC generator: A DC generator is a device that converts mechanical energy into direct current electricity.
Working of DC generators: A potential difference is induced in the coil as the generator's coil rotates in the magnetic field. This induced potential difference causes current to flow in one direction alone.
The correct option is: (2) Generator.

Note: Alternating current is used for power networks. One of the main reasons for using alternating current for power networks is that it allows for the usage of transformers due to its constant change over time. These devices convert electrical power, at whatever voltage and current it is generated, to high voltage and low current for long-distance transmission, and then down to a low voltage appropriate for each individual consumer.