Practicing Success

Target Exam

CUET

Subject

Physics

Chapter

Magnetism and Matter

Question:

Which of the following is NOT true ?

Options:

Bismuth when kept in a magnetic field, moves from stronger part of the field to the weaker part.

At Normal temperature and pressure (NTP), oxygen behaves as a paramagnetic susbstance.

A superconductor is strongly attracted by magnet.

All are true.

Correct Answer:

A superconductor is strongly attracted by magnet.

Explanation:

It is found that the a superconducting sample expels the magnetic flux as it becomes superconducting. This is called the Meissner effect . Thus  a Superconducting materials are strongly repelled from permanent magnets.

Diamagnetic materials are weakly repelled by permanent magnets. 

Paramagnetic materials are weakly attracted to permanent magnets.

Ferromagnetic materials are strongly attracted to permanent magnets.