Principle of Electric Motor:
An electric motor is a device that converts electrical energy into mechanical energy. It operates based on the principle of electromagnetic induction. When a current-carrying conductor is placed in a magnetic field, a force is exerted on the conductor, causing it to move. This principle is used in electric motors to produce rotational motion.

Working of Electric Motor:
An electric motor consists of several key components, including a stator, rotor, commutator, brushes, and a power source. Let's understand the working of an electric motor step by step:

1. Stator: The stator is the stationary part of the motor and consists of a set of electromagnets. These electromagnets are evenly spaced around the inner periphery of the motor.

2. Rotor: The rotor is the moving part of the motor and is connected to the shaft. It consists of a series of conductive bars or coils arranged in a cylindrical configuration. The rotor is positioned within the magnetic field created by the stator.

3. Commutator: The commutator is a cylindrical structure attached to the rotor. It consists of multiple segments, usually made of copper. The commutator ensures the flow of current in the rotor coils changes direction at the appropriate time, allowing continuous rotation.

4. Brushes: The brushes are stationary conductive contacts that make direct contact with the commutator. They allow the current to flow from the power source to the rotor coils.

5. Power Source: The power source, usually a battery or an AC power supply, provides the electrical energy required to drive the motor.

6. Working: When the current is supplied to the motor, it passes through the brushes and commutator, creating an electromagnetic field in the rotor coils. This field interacts with the magnetic field produced by the stator, resulting in a force that causes the rotor to rotate.

7. Continuous Rotation: As the rotor rotates, the brushes and commutator ensure that the direction of the current in the rotor coils changes at the right moment, allowing continuous rotation.

8. Output: The rotational motion of the rotor can be used to drive various mechanical devices or perform a specific task, depending on the application of the motor.

Overall, the working of an electric motor involves the conversion of electrical energy to mechanical energy, enabling the motor to perform useful work.

Diagram:
Here is a simplified diagram illustrating the components and working principle of an electric motor:

[Insert the diagram of an electric motor here]

Conclusion:
Electric motors are widely used in various applications, from household appliances to industrial machinery. Understanding the principles and working of electric motors helps in comprehending their functionality and potential applications.