CBSE Class 12 Physics 2019 Outside Delhi Set 1 Paper

Question : 3

Total: 27

The magnetic susceptibility of magnesium at 300K is 1.2×105. At what temperature will its magnetic susceptibility become 1.44×105 ?
OR
The magnetic susceptibility χ of a given material is -0.5 . Identify the magnetic material.

Solution:

● For writing relationship between susceptibility and temperature
● Calculating the temperature
‌χm∝‌

‌T2=‌

χm1

χm2

×T1
‌T2=‌

1.2×105

1.44×105

×300=250K
OR
● For identification of magnetic material
It is diamagnetic material.

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