Given below are two statements. One is labelled as Assertion (A) and the other is labelled as reason (R).

In the light of the given statements, choose the correct answer from the options given.

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Both (A) and (R) are true and (R) is the correct explanation of (A)

Both (A) and (R) are true but (R) is not the correct explanation of (A)

(A) is true but (R) is false

Both (A) and (R) are false

answer is C.

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Detailed Solution

Earth’s magnetic field inside a closed iron box is less as compared to the outside because the iron provides an easy path for the flow of magnetic field i.e. easily allows the formation of magnetic field. Hence the magnetic field lines prefer to go via iron material than through free space or air. This phenomenon is also called magnetic shielding.

Different materials have different values of permeability. The value of permeability for metals is very high. Hence in case of iron, which is a metal, the permeability is high. Hence the reason is false.

The correct reason for the assertion would be the high permeability value of iron.

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