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): | 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). |
1. | 2. | ||
3. | 4. |
Diamagnetic material in a magnetic field moves:
1. | from stronger to the weaker parts of the field |
2. | from weaker to the stronger parts of the field |
3. | perpendicular to the field |
4. | in none of the above directions |
A bar magnet is oscillating in the Earth's magnetic field with a period T. What happens to this period and motion if this mass is quadrupled:
1. | motion remains S.H.M. with time period = T/2 |
2. | motion remains S.H.M. with time period = 2T |
3. | motion remains S.H.M. with time period = 4T |
4. | motion remains S.H.M. with time and period remains nearly constant |
Among which of the following the magnetic susceptibility does not depend on the temperature:
1. Diamagnetism
2. Paramagnetism
3. Ferromagnetism
4. Ferrite
Two bar magnets having the same geometry with magnetic moments M and 2M are firstly placed in such a way that if their similar poles are on the same side then their time period of oscillation is T1. Now if the polarity of one of the magnets is reversed then the time period of oscillation is T2. The relation between T1 & T2 is:
1.
2.
3.
4.
For a vibration magnetometer, the time period of the suspended bar magnet can be reduced by:
1. moving it towards the south pole
2. moving it towards the north pole
3. moving it towards the equator
4. anyone of them
If the magnetic dipole moment of an atom of diamagnetic material, paramagnetic material and ferromagnetic material are denoted by µd, µp, and µf respectively, then:
1. µp = 0 and µf ≠ 0
2. µd ≠ 0 and µp = 0
3. µd ≠ 0 and µf ≠ 0
4. µd = 0 and µp ≠ 0