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Standard XII
Physics
Question

The B-H curve (i) and (ii) shown in fig., associated with
205325_e93cf9c96d714e08ab9432ae84d07376.png
  1. (i) diamagnetic and (ii) paramagnetic substance
  2. (i) paramagnetic and (ii) ferromagnetic substance
  3. (i) soft iron and (ii) steel respectively
  4. (i) steel and (ii) soft iron respectively

A
(i) diamagnetic and (ii) paramagnetic substance
B
(i) steel and (ii) soft iron respectively
C
(i) paramagnetic and (ii) ferromagnetic substance
D
(i) soft iron and (ii) steel respectively
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Solution
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Retentivity of soft iron is more than steel but coercivity of steel is more.
retentivity-the ability of a substance to retain or resist magnetization, frequently measured as the strength of the magnetic field that remains in a sample after removal of an inducing field.
coercivity-the resistance of a magnetic material to changes in magnetization, equivalent to the field intensity necessary to demagnetize the fully magnetized material.

582519_205325_ans_1b2226f1876b450dba354ba1fdd7290d.png

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