Question

with the help of an activity show how magnetic field lines around a bar magnet can be obtained.
Also draw the pattern of magnetic field
lines around a bar magnet.​

Answer 1

Answer:

The Magnetic field lines around a straight conductor carrying current are concentric circles whose centres lie on the wire. The direction of magnetic field lines can be determined using Right-Hand Thumb Rule.

Factors affecting the strength of magnetic field around a straight current carrying conductor

1. Magnetic field strength is directly proportional to the magnitude of current flowing in the conductor. i.e.

B∝I

, greater the current in the conductor, stronger will be the magnetic field produced.

2. Magnetic field strength is inversely proportional to the distance from the wire i.e.

B∝1r

, greater the distance from the current carrying conductor, weaker will be the magnetic field.

The following video shows that magnetic lines of forces are concentric circles around a straight current carrying conductor.

Explanation:

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