NEET Physics Biot-Savart Law MCQ Question
Consider a diagram illustrating the Biot-Savart Law where a current element I d l produces a magnetic field dB at a distance r. If the vectors d l and r are in the plane of the page, which direction will the magnetic field dB point?
Out of the page
Into the page
Parallel to r
Parallel to d l
Correct Answer
Detailed Explanation
According to the Biot-Savart Law, the direction of the magnetic field dB is determined by the right-hand screw rule, which indicates that if d l × r is clockwise, the magnetic field points into the page.
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