[amp_mcq option1=”Conduction” option2=”Induction” option3=”Convection” option4=”Direct Current” correct=”option2″]
The correct answer is B. Induction.
Eddy currents are induced electric currents that flow in closed loops in conductors when a varying magnetic field is applied to them. The direction of the eddy current is such that it opposes the change in the magnetic field that produced it. Eddy currents can be a source of heat loss in electrical machines and transformers. They can also be used to generate electricity in induction heating devices.
Conduction is the transfer of heat through direct contact between two objects. Convection is the transfer of heat through the movement of fluids. Direct current is a type of electric current that flows in one direction.
Here is a diagram that illustrates how eddy currents are generated:
The conductor is shown as a rectangle with a current flowing through it. The magnetic field is shown as a series of lines that are pointing out of the page. The changing magnetic field induces an electric current in the conductor. The direction of the eddy current is such that it opposes the change in the magnetic field.
Eddy currents can be a source of heat loss in electrical machines and transformers. They can also be used to generate electricity in induction heating devices.