NEET Physics Biot-Savart Law MCQ Question
Consider a scenario where a current element I d l is positioned along the x-axis, and a point P lies in the xy-plane at a distance r from this element. According to the Biot-Savart Law, which of the following correctly describes the direction of the magnetic field dB at point P?
Perpendicular to the xy-plane, directed into the page.
Parallel to the x-axis, directed towards the origin.
Parallel to the y-axis, directed towards positive y.
Perpendicular to the xy-plane, directed out of the page.
Correct Answer
Detailed Explanation
The Biot-Savart Law states that the magnetic field dB due to a current element is perpendicular to the plane formed by the element and the point. The use of the right-hand screw rule confirms the direction is into the page.
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