CBSE 2022 · Region 1 · Set 1 · Q15

A student fixes a sheet of white paper on a drawing board using some adhesive materials. She places a bar magnet in the centre of it and sprinkles some iron filings uniformly around the bar magnet using a salt-sprinkler. On tapping the board gently, she observes that the iron filings have arranged themselves in a particular pattern.

(a)

Draw a diagram to show this pattern of iron filings.

(b)

Draw the magnetic field lines of a bar magnet showing the poles of the bar magnet as well as the direction of the magnetic field lines.

(c)

(i)OR(ii)

How is the direction of magnetic field at a point determined using the field lines? Why do two magnetic field lines not cross each other?

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