Assertion(A) : Earth's magnetic field inside a closed iron box is less as compared to the outside.
Reason(R) : The magnetic permeability of iron is low.

Both A, R are true and R is the correct explanation of A

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Both A, R are true and R is not correct explanation of A

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A is true R is false

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A is false R is true

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Solution

The correct option is C A is true R is false
Earth's magnetic field inside a closed iron box is less compared to outside as lines of forces prefer to concentrate in the iron walls of the box as the magnetic permeability of iron is high.

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Assertion(A) : Earth's magnetic field inside a closed iron box is less as compared to the outside.Reason(R) : The magnetic permeability of iron is low.

The correct option is C A is true R is falseEarth's magnetic field inside a closed iron box is less compared to outside as lines of forces prefer to concentrate in the iron walls of the box as the magnetic permeability of iron is high.

Assertion(A) : Earth's magnetic field inside a closed iron box is less as compared to the outside.
Reason(R) : The magnetic permeability of iron is low.

The correct option is C A is true R is false
Earth's magnetic field inside a closed iron box is less compared to outside as lines of forces prefer to concentrate in the iron walls of the box as the magnetic permeability of iron is high.