Q. No.The magnetic susceptibility is negative for:
| 1. | paramagnetic materials only |
| 2. | diamagnetic materials only |
| 3. | ferromagnetic materials only |
| 4. | paramagnetic and ferromagnetic materials |
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Among which of the following the magnetic susceptibility does not depend on the temperature:
1. Diamagnetism
2. Paramagnetism
3. Ferromagnetism
4. Ferrite
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The permanent magnetic moment of the atoms of a material is zero. The material:
| a. | must be paramagnetic |
| b. | must be diamagnetic |
| c. | must be ferromagnetic |
| d. | may be paramagnetic |
Choose the correct option:
1. (a), (b)
2. (b) only
3. (c), (d)
4. (a), (d)
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| 1. | Large and negative | 2. | Large and positive |
| 3. | Small and positive | 4. | Small and negative |
| Statement I: | For diamagnetic substances, \(-1 \leq \chi <0 ,\) where \(\chi\) is the magnetic susceptibility. |
| Statement II: | Diamagnetic substances, when placed in an external magnetic field, tend to move from the stronger to the weaker part of the field. |
| 1. | Both Statement I and Statement II are correct. |
| 2. | Both Statement I and Statement II are incorrect. |
| 3. | Statement I is correct, and Statement II is incorrect. |
| 4. | Statement I is incorrect, and Statement II is correct. |
| Column-I | Column-II | ||
| \(\mathrm{(A)}\) | Diamagnetic | \(\mathrm{(P)}\) | \(\mu>>\mu_0.\mu_r>>1\) and \(\chi>>1\) |
| \(\mathrm{(B)}\) | Paramagnetic | \(\mathrm{(Q)}\) | \(-1\leq\chi<0,0\leq\mu_r<1\) and \(\mu<\mu_0\) |
| \(\mathrm{(C)}\) | Ferromagnetic | \(\mathrm{(R)}\) | \(0<\chi<\varepsilon,1<\mu_r<1+\varepsilon\) and \(\mu>\mu_0\) |
Codes:
| 1. | \(A\rightarrow P,B\rightarrow Q,C\rightarrow R \) |
| 2. | \(A\rightarrow Q,B\rightarrow R,C\rightarrow P\) |
| 3. | \(A\rightarrow Q,B\rightarrow P,C\rightarrow R \) |
| 4. | \(A\rightarrow R,B\rightarrow Q,C\rightarrow P \) |
(i) A is feebly repelled
(ii) B is feebly attracted
(iii) C is strongly attracted
(iv) D remains unaffected
1. C is of a diamagnetic material
2. D is of a ferromagnetic material
3. A is of a non-magnetic material
4. B is of a paramagnetic material
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Domain formation is the necessary feature of:
1. ferromagnetism
2. diamagnetism
3. paramagnetism
4. all of these
| 1. | much greater than one |
| 2. | one |
| 3. | between zero and one |
| 4. | equal to zero |
The magnetic susceptibility of an ideal diamagnetic substance is:
1. \(-1\)
2. \(0\)
3. \(+1\)
4. \(\infty \)
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