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In a permanent magnet at room temperature
- a)magnetic moment of each molecule is zero.
- b)the individual molecules have non-zero magnetic moment which are all perfectly aligned.
- c)magnetic domains are partially aligned.
- d)magnetic domains are all perfectly aligned
Correct answer is option 'C'. Can you explain this answer?
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In a permanent magnet at room temperature a)magnetic moment of each mo...
Key concept:- At room temperature permanent magnet behaves as a ferromagnetic substance for a long period of time. At room temperature, the permanent magnet retains ferromagnetic property for a long period of time.
The individual atoms in a ferromagnetic material possess a dipole moment as in a paramagnetic material.
However, they interact with one another in such a way that they spontaneously align themselves in a common direction over a macroscopic volume called domain. Thus, we can say that in a permanent magnet at room temperature, domains are all perfectly aligned.
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In a permanent magnet at room temperature a)magnetic moment of each mo...
At room temperature permanent magnet behaves as a ferromagnetic substance for a long period of time. At room temperature, the permanent magnet retains ferromagnetic property for a long period of time.
The individual atoms in a ferromagnetic material possess a dipole moment as in a paramagnetic material.
However, they interact with one another in such a way that they spontaneously align themselves in a common direction over a macroscopic volume called domain. Thus, we can say that in a permanent magnet at room temperature, domains are all perfectly aligned.
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In a permanent magnet at room temperature a)magnetic moment of each mo...
Permanent Magnet at Room Temperature
The correct answer is option 'C': magnetic domains are partially aligned. In order to understand this answer, let's break down the concept of a permanent magnet and the behavior of its molecules at room temperature.
1. Permanent Magnet:
A permanent magnet is a material that retains its magnetization even after the external magnetic field is removed. It is composed of ferromagnetic or ferrimagnetic materials, such as iron, cobalt, or nickel. These materials possess magnetic properties due to the alignment of their atomic or molecular magnetic moments.
2. Magnetic Moment:
The magnetic moment of an individual molecule is a measure of its ability to generate a magnetic field. It arises due to the alignment of the electron spins within the molecule. In a permanent magnet, the individual molecules have non-zero magnetic moments, meaning they possess inherent magnetization.
3. Behavior at Room Temperature:
At room temperature, thermal energy disrupts the perfect alignment of the magnetic moments within the material. This thermal agitation causes the magnetic moments to randomly point in different directions, resulting in a disordered state.
4. Magnetic Domains:
Magnetic domains are regions within a material where the magnetic moments of the molecules are aligned. These domains act as small magnets within the material. In an unmagnetized state, the domains are randomly oriented, cancelling out each other's magnetic fields.
5. Partial Alignment of Magnetic Domains:
When a permanent magnet is subjected to an external magnetic field during its manufacturing process, the domains start aligning in the direction of the applied field. Some domains align more easily, while others may resist alignment. As a result, the magnetic domains become partially aligned.
Conclusion:
In a permanent magnet at room temperature, the individual molecules have non-zero magnetic moments, but due to thermal agitation, they are not perfectly aligned. The magnetic domains within the material are partially aligned, causing a net magnetization and giving rise to the magnet's magnetic properties.
The correct answer is option 'C': magnetic domains are partially aligned. In order to understand this answer, let's break down the concept of a permanent magnet and the behavior of its molecules at room temperature.
1. Permanent Magnet:
A permanent magnet is a material that retains its magnetization even after the external magnetic field is removed. It is composed of ferromagnetic or ferrimagnetic materials, such as iron, cobalt, or nickel. These materials possess magnetic properties due to the alignment of their atomic or molecular magnetic moments.
2. Magnetic Moment:
The magnetic moment of an individual molecule is a measure of its ability to generate a magnetic field. It arises due to the alignment of the electron spins within the molecule. In a permanent magnet, the individual molecules have non-zero magnetic moments, meaning they possess inherent magnetization.
3. Behavior at Room Temperature:
At room temperature, thermal energy disrupts the perfect alignment of the magnetic moments within the material. This thermal agitation causes the magnetic moments to randomly point in different directions, resulting in a disordered state.
4. Magnetic Domains:
Magnetic domains are regions within a material where the magnetic moments of the molecules are aligned. These domains act as small magnets within the material. In an unmagnetized state, the domains are randomly oriented, cancelling out each other's magnetic fields.
5. Partial Alignment of Magnetic Domains:
When a permanent magnet is subjected to an external magnetic field during its manufacturing process, the domains start aligning in the direction of the applied field. Some domains align more easily, while others may resist alignment. As a result, the magnetic domains become partially aligned.
Conclusion:
In a permanent magnet at room temperature, the individual molecules have non-zero magnetic moments, but due to thermal agitation, they are not perfectly aligned. The magnetic domains within the material are partially aligned, causing a net magnetization and giving rise to the magnet's magnetic properties.
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In a permanent magnet at room temperature a)magnetic moment of each molecule is zero. b)the individual molecules have non-zero magnetic moment which are all perfectly aligned. c)magnetic domains are partially aligned. d)magnetic domains are all perfectly alignedCorrect answer is option 'C'. Can you explain this answer?
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