Question

. Describe an activity to show the pattern of magnetic field fines of a bar magnet, with the help of a cardboard piece and iron filings​

Answer 1

Answer:

Take a thick straight conductor XY and pass it through the centre of a thick cardboard. ... Sprinkle some iron filings on the cardboard and gently tap. You will see that the iron filings arrange themselves in concentric circles around the wire. These concentric circles represent the magnetic field lines...