CBSE Class 12-science Answered
Soft iron is used to make the core of transformer because of it's.....
a) low coercivity and low retentivity
b) high corecivity and low retentivity
Chose correct option and give reason.
Asked by Jayashri | 06 Mar, 2023, 06:47: PM
Expert Answer
A transformer's core is made from soft iron because it has low coercivity, which means that it is easily magnetized and demagnetized, and low retentivity, which means that it does not retain a magnetic field when a magnetic field is removed.
Hence a is correct option among the following.
Note:
- Coercivity is the magnetic material's resistance to changes in magnetization, which can be the field intensity required to demagnetize the magnetic material.
- Retentivity is the ability of magnetic materials to retain magnetization or the strength of the magnetic field that remains in magnetization after the external magnetic field has been removed.
Answered by Jayesh Sah | 06 Mar, 2023, 10:17: PM
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