Question

Describe the method by which an electrical potential developed in generators and thermocouple?

Answer 1

Electric generators develop an electric potential via magnetic induction. Moving a conducting rod through a magnetic field that exists between the poles of a horseshoe magnet causes an electric potential to be set up in the rod. Free electrons move through this rod from one end to the other for as long as movement of the rod is maintained. The direction of this movement depends on whether the rod is moved across the lines of force in the magnetic field in either the opposite direction or the same direction. Generators usually consist of multiple conductors mounted on a cylinder that rotates in a magnetic field.

Thermocouples utilize heat to develop an electric potential. Two strips of different metals are connected at one end to form a junction and the other ends are kept apart. A heat source is applied to the junction; this causes each metal strip’s temperature to rise at the junction. The free ends aren’t as hot and electric charges are produced at these free ends. Because the strips consist of different materials, there's a difference of potential between these free ends; when connected by a conducting wire, the electrons can move through the pathway. The voltage that's produced will become greater as the difference in temperature between the free ends and the junction increases.

Answer 2

Thermoelectric generator is the method by which an electrical potential developed in generators and thermocouple.

Step-by-step explanation:

• A thermoelectric generator (TEG), is otherwise known as a Seebeck generator, it is a solid-state device that directly converts heat flux into electrical power by a phenomenon called a Seebeck effect.
• Thermoelectric generators operate like heat engines except they are less voluminous and have no movable parts. TEGs are therefore usually more costly and competitive and it's efficient is less.
• Thermoelectric generators may be used in power plants to transform excess heat into extra electrical power, and in machines to improve fuel efficiency.