| ASSERTION: Magnetic susceptibility is a pure number. |
| REASON: The value of magnetic susceptibility for vacuum is one. |
A) If both assertion and reason are true and reason is the correct explanation of assertion.
B) If both assertion and reason are true and reason is not the correct explanation of assertion.
C) If assertion is true but reason is false.
D) If both assertion and reason are false.
E) If assertion is false but reason is true.
Correct Answer: C
Solution :
Magnetic susceptibility \[\left( {{\chi }_{m}} \right)\]is defined as the ratio of the intensity (M) of magnetization to the magnetic intensity (H) of the magnetizing field, that is \[{{\chi }_{m}}=\frac{M}{H}\] It is a pure number, because M and H have the same unit. Its value for vacuum is zero as there can be no magnetization in vacuum.
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