state gov BSSC Laboratory Assistant Mock Test Series 2025 Physics Magnetism and Maxwell's Equations The Earth’s Magnetism
A magnetic needle kept on the equator is free to rotate about the horizontal plane. After a stable reading is observed, the compass device is rotated by 90 degrees taking the magnetic needle as the axis of rotation. Again, a stable reading is observed. This reading
1
points to the true north
2
points to the magnetic north
3
points to the direction of the net magnetic field at that point
4
None of the above