NEET Physics Magnetic Force on Current Assertion Reason Question
Assertion (A): A straight wire carrying current does not contribute to the magnetic field at the center of a semicircular arc formed by the same wire.
Reason (R): The magnetic force on current-carrying segments parallel to the radial direction is zero.
Both Assertion (A) and Reason (R) are true, and Reason (R) is the correct explanation of Assertion (A).
Both Assertion (A) and Reason (R) are true, but Reason (R) is not the correct explanation of Assertion (A).
Assertion (A) is true, but Reason (R) is false.
Assertion (A) is false.
Correct Answer
Detailed Explanation
The straight segments of the wire do not contribute to the magnetic field at the center because the dl and r vectors are parallel, making the cross product zero.
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