Current carrying conductor produces magnetic field” is demonstrated by
Answers
Explanation:
Experiment:
In Fig , AB is a wire lying in the north- south direction and connected to a battery through a rheostat and a tapping key. A compass needle is placed just below the wire. It is observed that
(1) When the key is open i.e., no current passes through the wire, the needle shows no deflection and it points in the N-S direction (i.e. along the earth's magnetic field). In this position, the needle is parallel to the wire as shown in Fig. (a).
(2) When the key is pressed, a current passes in the wire in the direction from A to B (i.e. From south to north) and the north pole(N) of the needle deflects towards the west [Fig. (b)].
(3) When the direction of current in the wire is reversed by reversing the connections at the terminals of the battery, North Pole (N) of the needle deflects towards the east [Fig. (c)].
(4) If the compass needle is placed just above the wire. the North Pole (N) deflects towards east when the direction of current in wire is from A to B [Fig. (d)]. but the needle deflects towards west as in fig (e). if the direction of current in wire is from B to A.
The above observations of the experiment suggest that a current carrying wire produces a magnetic field around it.
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