Question

7. 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

• there are three types of magnets.
• there are

1. Bar. magnet
2. solenoid
3. U shaped magnet

• then, magnet has 2 poles. North and south poles.
• the magnetic lines are
• don't touch each other.
• they are start from north pole and ended to south pole.
• this lines are always curve shaped.
• The solenoid has greater magnetic field than bar magnet.

Answer 2

Answer:

-> Put a sheet of white paper on drawing board.

-> Place a bar magnet in the center.

-> Sprinkle some iron filings uniformly.

-> Then tap the board gently.

We can observe the iron filings arrange themselves in a pattern due to the influence of the magnetic field of the bar magnet. The pattern along which they align themselves represents the magnetic field lines around a bar magnet.

Explanation: