NEET Physics Ampere's Law Assertion Reason Question
Assertion (A): The magnetic field inside a long straight wire of radius 'a' carrying a uniform current 'I' is directly proportional to the distance from the center of the wire for r < a. | Reason (R): According to Ampere's Law, the magnetic field inside the wire is given by B = (μ₀I/2πa²) r.
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.
A is false.
Correct Answer
Detailed Explanation
The assertion is true as the magnetic field inside the wire is proportional to the distance from the center, and the reason correctly uses Ampere's Law to derive the expression for the magnetic field inside the wire.
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