MHT CET Physics question

Not in JEE Advanced syllabus

Statement 1: To protect any instrument from external magnetic field, it is put inside an iron box Statement 2: Iron is a magnetic substance

(A)Assertion is True, Reason is True; Reason is correct explanation for Assertion
(B)Assertion is True, Reason is True; Reason is not correct explanation for AssertionCorrect
(C)Assertion is True, Reason is False
(D)Assertion is False, Reason is True

Answer: (B)

Solution

Both statements are true, but magnetic shielding works because iron has very high permeability, so the field lines are concentrated in the iron walls and

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Question ID VK-080532