Explain with the help of two activities that current carrying wire produces
magnetic field?
Answers
Activity I:
1) Take a thermocol sheet and fix two thin wooden sticks of height 1cm which
have small slit at the top of their ends.
2) Arrange of copper wire of 24 gauge so that it passes thought these slits and make a circuit.
3) The circuit of 3 or 9v battery, key and copper wire which is connected in series as shown in figure.
4) Now, keep a magnetic compass below the wire and bring a bar magnet close the compass.
5) The needle in the compass deflects. This deflection is due to magnetic filed
produced by bar magnet.
6) Take the bar magnet far away from the circuit and switch on the circuit. Observe
the changes in compass.
7) The compass needle deflects.
8) This deflection is due to magnetic field produced by current carrying
conductor. (Wire)
Activity II:
1) Take a wooden plank and make a hole as shown in figure.
2) Place this plank on a table. Now place a retort stand on the plank.
3) Pass a 24 guage copper wire through a hole of the plank and rubber knob of the retort stand in such a way that the wire be arranged in a vertical position and doesn’t touch the stand.
4) Connect the two ends of wire to a battery via switch.
5) Place 6 to 10 compass needles in a circular path around the hole so that its centre coincides with the hole. Use 3 o r9 volts battery in a circuit.
6) Now switch on current flows through wire.
7) The compass needle deflects in a particular direction.
8) The deflection is due to magnetic field produced by current carrying wire.
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