Question

For what conversion is an electric motor used as a device?

Answer 1

Step 1: Electromagnetism

1. Electromagnetism is a branch of physics in which the notions of electricity and magnetism are combined.
2. Electromagnetism is used in the operation of dynamos, motors, and generators.
3. Electromagnetism can be produced by rotating a conductor in the magnetic field according to the faradays law of electromagnetic induction.
4. Electromagnetism can be applied to a variety of fields, including the industrial, transportation, communication, and medical fields.
5. Electromagnets are widely used as components of other electrical devices, such as motors, generators, electromechanical solenoids, relays, loudspeakers, hard disks, MRI machines, scientific instruments, and magnetic separation equipment.
6. There are many applications of electromagnetism in engineering—power generators, electrical machines, and transformers all rely on electromagnetism.

Step 2: Electric motor

1. An electrical motor is an electric machine that converts electrical energy into mechanical energy.
2. Electric motors are charged by direct current $\left(DC\right)$ sources like batteries.
3. We can also charge electric motors by alternating current $\left(AC\right)$ sources like inverters.
4. Electric motors are further divided into two types. AC motors and DC motors

Step 3: Parts of electric motor

1. ABCD is a rectangular coil.
2. Two powerful magnets of any type, such as horseshoe magnets or bar magnets. They're utilized to generate a powerful magnetic field.
3. The rectangular coil is rotated using split rings.
4. The brushes serve as a point of contact for the split rings.
5. Demonstrating with the help of a diagram.

Step 4: Working of an electric motor

1. When the electric current is sent through the rectangular coil ABCD, the results are as follows. The current between the BC and AD arms is parallel to the magnetic field, but the current between the AB and CD arms is perpendicular. As a result, only the AB and CD arms will be affected by the magnetic field.
2. The direction of the current in AB is along the y-axis, and the magnetic field is along the negative of the x-axis. Thus, by fleming's left-hand rule, the direction of the magnetic force acting on the AB is in the upward direction
3. As a result, the split rings are not rotating the coil but the magnetic force acting on the coil in the magnetic field and current causes the rotation.
4. The ring Q will come into contact with the brush X after the half revolution, and the ring P will come into contact with the Y, causing the current to shift direction.
5. The direction of forces in the arms AB and CD will also vary as the current changes, therefore the coil will continue to rotate in the same direction.

Hence, we use an electric motor for converting electrical energy into mechanical energy.