Generators and motors

Let us learn what are Generators and motors,
Generators and motors

Generators and motors are applications of electromagnetic
induction. Figure illustrates a simple electric generator.



A simple electric generator.

The crank represents a mechanical method of turning the loop of wire in a magnetic field. The change in magnetic flux through the loop generates an induced current; thus, the generator converts mechanical energy into electrical energy. The operation of a motor is similar to that of a generator but in reverse. The motor has similar physical components except that the electric current supplied to the loop exerts a torque, which turns the loop. The motor, therefore, converts electrical energy into mechanical energy.
Hope the above explanation was useful.

Ammeters and Voltmeters

Galvanometers, ammeters, and voltmeters :

The torque on a current loop in a magnetic field provides the basic principle of the galvanometer, a sensitive current-measuring device. A needle is affixed to a current coil—a set of loops. The torque gives a certain deflection of the needle, which is dependent upon the current, and the needle moves over a scale to allow a reading in amperes.

An ammeter is a current-measuring instrument constructed from a galvanometer movement in parallel with a resistor. Ammeters are manufactured to measure different ranges of current. A voltmeter is constructed from a galvanometer movement in series with a resistor. The voltmeter samples a small portion of the current, and the scale provides a reading of potential difference—volts—between two points in the circuit.

Hope the above explanation helped you.