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प्रश्न
Distinguish between diamagnetic and paramagnetic substances
उत्तर
| No | Diamagnetic substance | Paramagnetic substance |
| 1 | In an external magnetic field, a substance gets weakly magnetised in the direction opposite to that of the field. | In an external magnetic field, a paramagnetic substance gets weakly magnetised in the same direction as that of the field. |
| 2 | When placed in a non-uniform magnetic field, it tends to move from the stronger to the weaker part of the field. | When placed in a non-uniform magnetic field, it tends to move from the weaker to the stronger part of the field. |
| 3 | It is weakly repelled by a magnet. | It is weakly attracted by a magnet |
| 4 | Magnetic moment of every atom of a diamagnetic substance is zero. | Every atom of a paramagnetic substance is a magnetic dipole having a certain resultant magnetic moment. |
| 5 | When a rod of diamagnetic substance is suspended in a uniform magnetic field, it comes to rest with its length perpendicular to the direction of the field. | When a rod of paramagnetic substance is suspended in a uniform magnetic field, it comes to rest with its length parallel to the direction of the field. |
| 6 | There is no effect of temperature on diamagnetic substance. | There is effect of temperature on paramagnetic substance. |
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?
Out of the two magnetic materials, 'A' has relative permeability slightly greater than unity while 'B' has less than unity. Identify the nature of the materials 'A' and 'B'. Will their susceptibilities be positive or negative?
The magnetic susceptibility of annealed iron at saturation is 4224. Find the permeability of
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The susceptibility of a magnetic material is − 2.6 × 10−5. Identify the type of magnetic material and state its two properties.
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Two substances A and B have their relative permeability slightly greater and slightly less than 1 respectively. What do you conclude about A and B as far as their magnetic materials are concerned?
A paramagnetic gas has 2.0 × 1026 atoms/m with atomic magnetic dipole moment of 1.5 × 10−23 A m2 each. The gas is at 27°C.
- Find the maximum magnetization intensity of this sample.
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A rod of magnetic material of cross-section 0.25 cm2 is placed in a magnetizing field of intensity 4000 A/m-1. The magnetic flux passing through the rod is 25 × 10-6 Wb. Find out
(a) relative permeability
(b) magnetic susceptibility and
(c) magnetisation of the rod.
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The magnetic property of magnetic substance is associated with ____________.
The product of magnetic susceptibility (`chi`) and absolute temperature (T) is constant for a ____________.
Above the curie temperature the susceptibility of ferromagnetic substance varies ____________.
A sphere of gold when brought towards a powerful magnet experiences ____________.
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Why is diamagnetism, in contrast, almost independent of temperature?
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The magnetic susceptibility is negative for ______.
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Most of the substance show which of the magnetic property:-
If a charged particle at rest experience no electromagnetic force
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- Some lines of B must be discontinuous across S.
- Lines of H are necessarily continuous across S.
- Lines of H cannot all be continuous across S.
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- 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.
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- electrostatic field lines can end on charges and conductors have free charges.
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- shells of high permeability materials can be used to divert lines of B from the interior region.
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If the magnetizing field on a ferromagnetic material is increased, its permeability ______.
A uniform magnetic field gets modified as shown in figure when two specimens A and B are placed in it.
 |
 |
| (a) | (b) |
- Identify the specimen A and B.
- How is the magnetic susceptibility of specimen A different from that of specimen B?
Magnetic susceptibility for a paramagnetic and diamagnetic materials is respectively ______.
An ammeter of resistance R gives a full-scale deflection when a current of 2 A passes through it. If it is measured with a maximum current of 10 A, the required shunt is ______.
Which of the following cannot modify an external magnetic field as shown in the figure?
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What is magnetic hysterisis?
Explain ferromagnetism on the basis of the domain theory.
Explain the Domain theory in brief.
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