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प्रश्न
The BH curve for a ferromagnetic material is shown in the figure. The material is placed inside a long solenoid which contains 1000 turns/cm. The current that should be passed in the solenonid to demagnetize the ferromagnet completely is
पर्याय
1.00 m A
1.25 mA
1.50 mA
1.75 mA
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उत्तर
1.50 mA
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संबंधित प्रश्न
What happens to the domains in a ferromagnetic material in the presence of external magnetic field?
Example of ferromagnetic substance is ____________.
When heated to high temperature, ferromagnetic substance changes to ____________.
A ferromagnetic substance becomes a permanent magnet when it is placed in a magnetic field becuase ______.
Which one of the following homo-diatomic molecule is paramagnetic?
Some of the polar crystals when heated produces small electrical current. This phenomenon is called ______.
Which of the following is not paramagnetic?
Match items of List - I with those of List - II:
| List - I | List - II | ||
| (Property) | (Example) | ||
| (A) | Diamagnetism | (i) | MnO |
| (B) | Ferrimagnetism | (ii) | O2 |
| (C) | Paramagnetism | (iii) | NaCl |
| (D) | Antiferromagnetism | (iv) | Fe3O4 |
Choose the most appropriate answer from the options given below:
Give a reason for the following:
Cu+2 salts are paramagnetic, while Cu+ salts are diamagnetic.
The metal complex ion that is paramagnetic is ______.
(Atomic number of Fe = 26, Cu = 29, Co = 27 and Ni = 28)
