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JEE Main 2014 (19 Apr, Shift 1) · Magnetic Materials & Curie Law

Magnetic Materials & Curie Law question from JEE Main 2014 (19 Apr, Shift 1)

Q31JEE Main 2014 · 19 APR · SHIFT 1Easy

Magnetic Materials & Curie Law

An example of a perfect diamagnet is a superconductor. This implies that when a superconductor is put in a magnetic field of intensity B, the magnetic field Bs inside the superconductor will be such that:

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Answer: (b)

Perfect diamagnet: $\chi = -1$ , so $\mu_r = 1 + \chi = 0$ .
$B_s = \mu_0\mu_r H = 0$ : the field is completely expelled (Meissner effect).
So the answer is (b) $B_s = 0$ .

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