alleryStart learning →A region of a ferromagnet with all atomic moments aligned the same way is a
- domain
- lattice
- polaron
- phase front
Show answer and solution
Correct answer: A. domain
Such a uniformly aligned region is called a magnetic domain.
MHT-CET Magnetic Materials — practice questions — page 2
Explore 38 free Magnetic Materials questions in MHT-CET Physics. Open each question or exercise to read its content, reference answers and available explanation.
Practise Magnetic Materials with Quill →Magnetic Materials questions and exercises with answers
Showing questions 31–38 of 38.
A region of a ferromagnet with all atomic moments aligned the same way is aRead the answer and worked solution →The temperature above which a ferromagnet behaves as a paramagnet is itsRead the answer and worked solution →On heating a ferromagnet, its domain structure distorts because exchange couplingRead the answer and worked solution →The value of B left in a ferromagnet when H is reduced to zero is calledRead the answer and worked solution →The reverse field H needed to bring B to zero in a hysteresis cycle is calledRead the answer and worked solution →Materials used for permanent magnets should haveRead the answer and worked solution →Electromagnet cores are made of soft iron because it hasRead the answer and worked solution →Sensitive instruments are protected from stray fields by enclosing them in a case ofRead the answer and worked solution →
Worked practice questions
The temperature above which a ferromagnet behaves as a paramagnet is its
- boiling point
- Debye point
- Curie temperature
- critical point
Show answer and solution
Correct answer: C. Curie temperature
Above the Curie temperature the domain structure collapses and the material turns paramagnetic.
On heating a ferromagnet, its domain structure distorts because exchange coupling
- strengthens
- weakens a lot
- reverses sign
- stays unchanged
Show answer and solution
Correct answer: B. weakens a lot
Higher thermal motion weakens coupling between neighbouring moments until domains collapse.
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