NEET Physics Magnetic Force on Current Assertion Reason Question
Assertion (A): The magnetic force on a current-carrying wire is zero if the wire is aligned parallel to the magnetic field lines. | Reason (R): The magnetic force is given by the cross product of current element and magnetic field, which is zero when they are parallel.
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, but R is true.
Correct Answer
Detailed Explanation
The magnetic force on a current-carrying wire is determined by the cross product of the current element and the magnetic field. If the wire is parallel to the field, the angle is zero, making the cross product zero, hence no force.
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