NEET Physics Magnetic Force on Current Assertion Reason Question
Assertion (A): A straight current-carrying wire placed in a uniform magnetic field experiences a force even if the wire is aligned parallel to the field. | Reason (R): The magnitude of the force experienced by a current-carrying wire in a magnetic field is given by F = IlB sin θ, where θ is the angle between the current direction and the magnetic field.
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 assertion is false because when the wire is parallel to the magnetic field, θ = 0, and the force F = IlB sin 0 = 0. The reason correctly states the formula for the force.
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