1. | increases |
2. | decreases |
3. | remains unchanged |
4. | decreases first and then increases |
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. | \(\dfrac{2}{\mu_0}\left(B_eR^3\right )\) |
1. | increased |
2. | decreased |
3. | unchanged |
4. | fluctuating with time: first increasing and then decreasing |
Assertion (A): | Gauss's law for magnetism states that the net magnetic flux through any closed surface is zero. |
Reason (R): | The magnetic monopoles do not exist. North and South poles occur in pairs, allowing vanishing net magnetic flux through the surface. |
1. | (A) is True but (R) is False. |
2. | (A) is False but (R) is True. |
3. | Both (A) and (R) are True and (R) is the correct explanation of (A). |
4. | Both (A) and (R) are True but (R) is not the correct explanation of (A). |
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. |
1. | \(E_B\cdot\tau_B\) | 2. | \(\dfrac{E_B}{\tau_B}\) |
3. | \(E_B^2+\tau_B^2\) | 4. | \(E_B^2-\tau_B^2\) |
1. | attractive. |
2. | repulsive. |
3. | zero. |
4. | any of the above depending on the external field \(B\) and the sample separation. |
1. | \(B^{-3}\) | 2. | \(B^{-2}\) |
3. | \(B^{-1/2}\) | 4. | \(B^{-1/3}\) |
1. | \(0.75~\text{A}\) | 2. | \(75~\text{A}\) |
3. | \(1.33~\text{A}\) | 4. | \(133~\text{A}\) |