What is the function of a dynamo?

A dynamo is a device specifically designed to convert mechanical energy into electrical energy, and it does this by generating direct current (DC). The principle behind a dynamo involves electromagnetic induction, where a conductor (usually a coil of wire) moves through a magnetic field, producing an electric current.

The essential characteristic of a dynamo is that it usually produces direct current rather than alternating current (AC), which is produced by generators that utilize different mechanisms. While transformers are capable of transforming voltage levels, they do not generate electrical power; instead, they adjust voltage for transmission. Additionally, static current is not a commonly recognized nomenclature in electrical engineering, as current in circuits is typically dynamic and flowing.

In summary, the primary function of a dynamo is effectively to generate direct current by harnessing mechanical energy in conjunction with electromagnetic principles. This is why identifying it as a generator of direct current is the correct choice.