1. | \(\dfrac{\pi}{\mu_0}\left(B_eR^3\right )\) | 2. | \(\dfrac{2\pi}{\mu_0}\left(B_eR^3\right )\) |
3. | \(\dfrac{4\pi}{\mu_0}\left(B_eR^3\right )\) | 4. | \(\dfrac{2}{\mu_0}\left(B_eR^3\right )\) |
Statement I: | The magnetic field of a circular loop at very far away point on the axial line varies with distance as like that of a magnetic dipole. |
Statement II: | The magnetic field due to magnetic dipole varies inversely with the square of the distance from the centre on the axial line. |
1. | Statement I is correct and Statement II is incorrect. |
2. | Statement I is incorrect and Statement II is correct. |
3. | Both Statement I and Statement II are correct. |
4. | Both Statement I and Statement II are incorrect. |
Assertion (A): | Susceptibility is defined as the ratio of intensity of magnetization \(I\) to magnetic intensity \(H\). |
Reason (R): | Greater the value of susceptibility, smaller the value of the intensity of magnetization \(I\). |
1. | Both (A) and (R) are True and (R) is the correct explanation of (A). |
2. | Both (A) and (R) are True but (R) is not the correct explanation of (A). |
3. | (A) is True but (R) is False. |
4. | (A) is False but (R) is True. |
Assertion (A): | Magnetic susceptibility is a pure number. |
Reason (R): | The value of magnetic susceptibility for vacuum is one. |
1. | Both (A) and (R) are True and (R) is the correct explanation of (A). |
2. | Both (A) and (R) are True but (R) is not the correct explanation of (A). |
3. | (A) is True but (R) is False. |
4. | Both (A) and (R) are False. |
Statement I: | All paramagnetic substances become diamagnetic as their temperature is lowered. |
Statement II: | All ferromagnetic substances become paramagnetic when their temperature is lowered. |
1. | Statement I is incorrect and Statement II is correct. |
2. | Both Statement I and Statement II are correct. |
3. | Both Statement I and Statement II are incorrect. |
4. | Statement I is correct and Statement II is incorrect. |
1. | diamagnetism only |
2. | ferromagnetism only |
3. | paramagnetism only |
4. | both paramagnetism and diamagnetism |
1. | attract all three of them |
2. | attract \(N_1\) and \(N_2\) strongly but repel \(N_3\) weakly |
3. | attract \(N_1\) strongly, \(N_2\) weakly and repel \(N_3\) weakly |
4. | attract \(N_1\) strongly, but repel \(N_2\) and \(N_3\) weakly |