MCQ
Among the following $.......$ has the highest retentivity.
- AAluminium
- ✓Steel
- CNickel
- DSoft iron
✓
Answer
Correct option: B.
Steel
The power of magnetism after the inducing agency is removed, is called Retentivity of a substance.
Retentivity is used for remanence measured in units of magnetic flux density.
Steel retains magneto-field longer, iron acquires the field easier but decays sooner.
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