GK QUESTION#2973

In the usual horizontal-plane neutral-point experiment with a bar magnet: Assertion (A): The resultant horizontal magnetic field is zero at a neutral point. Reason (R): The magnet’s horizontal field cancels Earth’s horizontal magnetic field there.

ABoth A and R are true, and R is the correct explanation of A.Correct answer
BBoth A and R are true, but R is not the correct explanation of A.
CA is true, but R is false.
DA is false, but R is true.

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Answer

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

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Explanation

In the usual horizontal-plane neutral-point experiment, the magnet’s horizontal field and Earth’s horizontal field cancel. The resultant horizontal field is zero. This does not imply that every component of the three-dimensional terrestrial field vanishes.

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In the usual horizontal-plane neutral-point experiment with a bar magnet: Assertion (A): The resultant horizontal magnetic field is zero at a neutral point. Reason (R): The magnet’s horizontal field cancels Earth’s horizontal magnetic field there.

Answer

Explanation

In the usual horizontal-plane neutral-point experiment with a bar magnet: Assertion (A): The resultant horizontal magnetic field is zero at a neutral point. Reason (R): The magnet’s horizontal field cancels Earth’s horizontal magnetic field there.

Answer

Explanation

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