Question

when the current is switched on through a wire,a compass needle kept nearby gets deflected from its north south direction .Explain

Answer 1

The current flowing through the wire produces magnetic effect around it which deflect the needle of the compass kept nearby as it is also a piece of magnet.

Answer 2

Answer:

When current is passed through the coiled wire, it deflects the compass near it from its north-south position like a magnet. This is called magnetic effect of the current. As we know that needle of the compass is made up of a thin magnet. When this needle comes in contact with another magnet then the like poles of the magnet repel each other and opposite poles attract each other. So the deflection is seen in the needle. In this case the wire behaves like a magnet and causes deflection in needle of the compass.