**Explanation:**

A dynamo is a device that converts mechanical energy into electrical energy. It consists of a coil of wire that rotates within a magnetic field. As the coil rotates, the magnetic field induces a current in the wire, which generates electricity.

**1. Conversion of Mechanical Energy:**
The primary function of a dynamo is to convert mechanical energy into electrical energy. Mechanical energy can come from various sources such as wind, water, steam, or human-powered devices. The motion of the coil within the magnetic field creates a changing magnetic flux, which induces an electromotive force (EMF) in the wire. This EMF causes a current to flow through the wire, generating electricity.

**2. Magnetic Field Interaction:**
When the coil rotates within the magnetic field, the magnetic field lines cut across the wire, creating a changing magnetic flux. According to Faraday's law of electromagnetic induction, a change in magnetic flux induces an EMF in a conductor. This induced EMF generates a current in the wire, which is the basis for generating electricity in a dynamo.

**3. Electrical Energy Generation:**
The conversion of mechanical energy into electrical energy in a dynamo is achieved by the continuous rotation of the coil within the magnetic field. As long as there is mechanical energy input to rotate the coil, the dynamo will generate electricity. The generated electricity can be used to power various devices and systems, providing a source of electrical energy.

**Conclusion:**
In conclusion, a dynamo acts as a converter of energy, specifically converting mechanical energy into electrical energy. Through the interaction of a rotating coil within a magnetic field, the dynamo generates electricity by inducing an electromotive force in the wire. This electrical energy can then be utilized for various applications, making the dynamo an essential device for power generation.