STANDARDPhysics-Magnetism
STANDARD Physics Magnetic Field of a Bar Magnet MCQ Question
Type: MCQ-numerical-Medium
A short bar magnet has a magnetic moment of 0.39 J T⁻¹. The magnitude and direction of the magnetic field produced by the magnet at a distance of 20 cm from the centre of the magnet on the equatorial line of the magnet is
A
0.049 G, N-S direction
B
4.95 G, S-N direction
C
0.0195 G, S-N direction
D
19.5 G, N-S direction
Correct Answer
Option A
Detailed Explanation
The magnetic field on the equatorial line of a short bar magnet is given by B = (μ₀/4π) * (M/d³). Substituting the given values, B = 0.049 G in the N-S direction.
Found an issue with this question?