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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

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B

rises up

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C

remains same

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D

first goes down and then rise

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Solution

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.


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