Question

For a dynamo which one of the following statements is correct
A. It converts electrical energy into light energy
B. It converts kinetic energy into heat energy
C. It converts mechanical energy into electrical energy
D. It converts electrical energy into mechanical energy

Answer 1

Hint: The other name of the dynamo is the generator. Fleming’s right hand rule is also called the dynamo rule. This rule represents the direction of the flow of the induced current when a metal (a current carrying conductor) attached to a circuit moves in a magnetic field.

Complete step by step answer:
A dynamo is an electrical device, an electrical generator, that produces direct current. (D. C). Using Faraday's law of induction, the rotating coils of wire of the electric dynamo converts the mechanical rotation into pulsing direct electric current.
The stationary structure, in a dynamo, called stator provides a constant magnetic field. A set of rotating windings rotate within the magnetic field, and this set is called an armature. This rotation creates electromagnetic force within the magnetic field that pushes the electrons in the metal, resulting in the generation of the electric current in the wire.
This conversion of the mechanical energy (the rotating of windings within the magnetic field) into the electrical energy (the generation of the electric current in the wire as a result of the movement of the electron in the metal) is the working principle of a dynamo.
As the dynamo converts mechanical energy into electrical energy.

So, the correct answer is “Option C”.

Note: The examples that represent the conversions given in the options are: The electric bulb converts electrical energy into the light energy. When we rub our palms, the kinetic energy stored in it gets converted into heat energy. A turbine converts the mechanical energy into electrical energy. An electric motor converts electrical energy into mechanical energy, as it uses electric current to run and pump the water.