Question

When a bar magnet is cut into two equal pieces along its length, we get two magnets each of _____ the pole strength

• A. one third
• B. half
• C. double
• D. four times

Answer 1

The correct option is B

half

Pole strength is the attractive force by which any object is attracted towards the magnet.

Pole strength of the magnet depends upon some of the factors like:

1. shape of the magnet (bar magnet, horse shoe magnet, etc.)
2. distance between the poles
3. nature of material (paramagnetic, ferromagnetic, or diamagnetic)
4. state of magnetization
5. Magnetic Moment

As the bar magnet is cut into two equal pieces along its length, its magnetic moment will reduce by half but the distance between the poles will remain same. Therefore, the Pole Strength will become half.
Hence, option (b) is the correct answer.