Question

How do you trace the magnetic field lines around a bar magnet using
compass needle ? Explain​

Answer 1

Answer:

Detecting magnetic fields

place the plotting compass near the magnet on a piece of paper.

• mark the direction the compass needle points.
• move the plotting compass to many different positions in the magnetic field, marking the needle direction each time.
• join the points to show the field lines..

Answer 2

Answer:

take some iron flakes and spread them all the places in a paper then place a bar magnet at the middle of the paper after sometime the bar manet attract the iron flakes in such a way that it forms a figure similar to the magnetic field

the compass needle is made up of iron piece that was suspended in zero friction that indicatess the earth's magnetic field