WAEC - Physics (2018 - No. 45)
A student uses two compass needles to investigate the magnetic field around a bar magnet. Which of the following diagrams show the correct directions of the needles?
A
B
C
D
คำอธิบาย
By convention, the field direction is taken to be outward from the North pole and in to the South pole of the magnet. Also, they form closed lines.