Question

Q. (a) What are ‘magnetic field lines’? How is the direction of a magnetic field at a point determined ?

(b) Draw two field lines around a bar magnet along its length on its two sides and mark the field directions on them by arrow marks.

Answer 1

when abar magnet is placed on a cardboard and iron fillings are sprinkled ,they will arrange themselves in a pattern of line s known as magnetic field lines

Answer 2

a - the path traced by a north magnetic pole free to move under the influence of the magnetic field is called magnetic field lines .
magnetic field lines are the lines drawn from north pole to south pole

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