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प्रश्न
Which of the following substances are para-magnetic?
Bi, Al, Cu, Ca, Pb, Ni
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उत्तर
Paramagnetic substances are Aluminum (Al) and Calcium (Ca).
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संबंधित प्रश्न
The magnetic susceptibility of a paramagnetic material at - 73 °C is 0.0075. Its value at -173 °C will be ______.
Would the maximum possible magnetisation of a paramagnetic sample be of the same order of magnitude as the magnetisation of a ferromagnet?
Metals getting magnetised by orientation of atomic magnetic moments in external magnetic field are called ______.
A long solenoid has 1000 turns per metre and carries a current of 1 A. It has a soft iron core of µr = 1000. The core is heated beyond the Curie temperature, Tc.
- The H field in the solenoid is (nearly) unchanged but the B field decreases drastically.
- The H and B fields in the solenoid are nearly unchanged.
- The magnetisation in the core reverses direction.
- The magnetisation in the core diminishes by a factor of about 108.
Which of the following has a permeability less than that of free space?
Explain the origin of paramagnetism on the basis of atomic structure.
Explain the meaning of the following statement:
Curie temperature for soft iron is 770°C.
