Electrical Engineering XYZ MCQs
Hysteresis loop represents the area of:
- Hysteresis losses
- Copper losses
- Total iron losses
- Eddy current losses
Correct answer: 1. Hysteresis losses
Explanation: The correct answer to this Electrical Engineering MCQ is: Hysteresis losses
A hysteresis loop is a graphical representation of the magnetic behavior of a material subjected to an alternating magnetic field. It shows the relationship between the magnetic flux density (B) and the magnetizing force (H) as the material undergoes cycles of magnetization and demagnetization.
The area enclosed by the hysteresis loop represents the energy loss in the form of hysteresis losses. Hysteresis losses occur due to the energy dissipated as heat when the magnetic domains within the material repeatedly align and realign themselves in response to the changing magnetic field. This energy loss is represented by the area within the hysteresis loop.
The other options, such as copper losses (resulting from resistance in conductors), total iron losses (including hysteresis and eddy current losses), and eddy current losses (caused by circulating currents induced in the core material), are not directly represented by the area of the hysteresis loop. The hysteresis loop primarily reflects the hysteresis losses in the magnetic material.