A. Hysteresis loss.
B. Eddy current loss.
C. Copper loss.
D. All of the Above
Answer: B. Eddy current loss.
Explanation:
When an alternating magnetic field is applied to a magnetic material, an emf is induced in the material itself according to Faraday’s Law of Electromagnetic induction.
Since the magnetic material is a conducting material, these EMFs circulate current within the body of the material.
These circulating currents are called Eddy Currents. They will occur when the conductor experiences a changing magnetic field.
As these currents are not responsible for doing any useful work, and it produces a loss (I2R loss) in the magnetic material known as an Eddy Current Loss. Similar to hysteresis loss, eddy current loss also increases the temperature of the magnetic material.
The hysteresis and the eddy current losses in a magnetic material are also known by the name iron losses or core losses or magnetic losses.
By laminating the core of transformer we make the eddy current circulating path narrow, means increasing the resistance of eddy current and proportionately reducing the eddy current.
Although the resistance of eddy current path Re increases, but as the eddy current Ie reduces, the overall eddy current loss Ie2Re is reduced.