ARRYING

ARRYING In Activity . , we have seen that an electric current through a metallic conductor produces a magnetic field around it. In order to find the direction of the field produced let us repeat the activity in the following way – Drawing a magnetic field line with the help of a compass needle Mark the position of two ends of the needle. Now move the needle to a new position such that its south pole occupies the position previously occupied by its north pole. In this way, proceed step by step till you reach the south pole of the magnet as shown in Fig. . . Join the points marked on the paper by a smooth curve. This curve represents a field line. Repeat the above procedure and draw as many lines as you can. You will get a pattern shown in Fig. . . These lines represent the magnetic field around the magnet. These are known as magnetic field lines. Observe the deflection in the compass needle as you move it along a field line. The deflection increases as the needle is moved towards the poles. Field lines around a bar magnet