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प्रश्न
Identify the following magnetic materials :
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उत्तर
For Diamagnetic materials, xm < 0
For paramagnetic materials, xm > 0
For superparamagnetic materials, xm >>0
(i) if xm =-0.00015 < 0, the material is Diamagnetic.
(ii) if xm = 10-5 > 0, the material is paramagnetic because the value of susceptibility is greater than zero but has a very small value.
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संबंधित प्रश्न
Which of the following substances is ductile?
In what way is the behaviour of a diamagnetic material different from that of a paramagnetic, when kept in an external magnetic field?
All atoms of a magnetic substance have a resultant magnetic moment even in absence of external magnetic field. The substance is ______.
If a magnetic field is applied to a liquid in one arm of a narrow U-tube, the liquid level in that arm is lowered. The liquid in U-tube arm is ______.
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.
- Assertion (A): Diamagnetic substances exhibit magnetism.
- Reason (R): Diamagnetic materials do not have a permanent magnetic dipole moment.
Which of the following cannot modify an external magnetic field as shown in the figure?
State the dimensions of magnetization.
Match List-I with List-II.
| List-I (Material) | List-II (Susceptibility) | ||
| A. | Diamagnetic | I. | χ = 0 |
| B. | Ferromagnetic | II. | 0 > χ ≥ −1 |
| C. | Paramagnetic | III. | χ >> 1 |
| D. | Non-magnetic | IV. | 0 < χ < ε |
Choose the correct answer from the options given below:
