Question

A paramagnetic liquid is taken in a U-tube and arranged so that one of its limbs is kept between pole pieces of the magnet. What happens to the liquid level in the limb?

• A. goes down
• B. rises up
• C. remains same
• D. first goes down and then rise

Answer 1

The correct option is B

rises up

Paramagnetic substances

1. They are substances that are weakly attracted by a magnet.
2. They do not retain their magnetic property when the external field is removed.
3. Eg: aluminum, platinum, sodium, etc.

Explanation

1. Since paramagnetic substances show magnetic behavior, when the pole pieces of a magnet are placed around a limb of a U-tube containing a paramagnetic substance, the paramagnetic substance gets attracted to the magnet and rises up.
   
2. The figure shows the rise in the height of paramagnetic substances in the U-tube when the side is magnetized using magnets.

Option B is correct.