Explain with the help of an activity that current carrying wire produces magnetic field.

 

Answer:

1. Take a thermocol sheet and fix two thin wooden sticks which have small slit at top of their ends as shown in the above figure.
2. Arrange a 24 guage copper wire by passing through these slits and make a circuit.
3. The circuit consists of a 9 Volt battery, key and copper wire connected in series.
4. Now keep a magnetic compass below the wire and bring a bar magnet close to the compass.
5. The needle in the compass deflects due to magnetic field produced by bar magnet.
6. Now take the bar magnet away and switch on the circuit. Observe the compass needle.
7. Again the compass needle deflects due to magnetic field produced by the current carrying wire.
8. Thus we can say that current carrying wire produces magnetic field.