Paramagnetic materials pdf

Find Free WordPress Themes and plugins. Did you find apk for android? You can find new Free Android Games and apps. Log in to Reply. Leave a Comment Cancel reply You must be logged in to post a comment. Answer Detailed Solution Below Option 1 : positive and large.

Concept : The measurement of how much a magnetic material will get magnetized in a magnetic field is called susceptibility. Magnetic susceptibility is the ratio of magnetization and the applied magnetizing field intensity.

The magnetic materials which are weekly attracted by a magnet are called a paramagnetic substance. The magnetic material which is repelled by a magnet is called diamagnetic material. Explanation : As ferromagnetic materials exhibit strong magnetism in a magnetic field.

So the susceptibility of ferromagnetic is much greater than 1. The intensity of Magnetisation: The moment of the magnetic dipole formed per unit volume when a magnetic material undergoes the magnetization field is called the intensity of magnetization. Magnetic susceptibility : The ratio of the intensity of magnetization to magnetic intensity is defined as the Magnetic Susceptibility.

So option 4 is correct. Light weight permanent magnet Transformer cores Electrical machinery High frequency equipment. Answer Detailed Solution Below Option 4 : Concept: Magnetic field strength or field intensity H is the amount of magnetizing force. Answer Detailed Solution Below Option 4 : magnetic susceptibility.

The ratio of permeability of a medium to the permeability of free space is called relative magnetic permeability. The total magnetic field passing through a surface area normally is called magnetic flux. Iron Aluminum Nickel Gold. CONCEPT : Magnetic materials : The materials that can be either attracted or repelled when placed in an external magnetic field and can be magnetized themselves are called magnetic materials. For examples: Iron, nickel, cobalt, etc Diamagnetic Substance Paramagnetic substances Ferromagnetic substances Diamagnetic substances are those which develop feeble magnetization in the opposite direction of the magnetizing field.

Paramagnetic substances are those which develop feeble magnetization in the direction of the magnetizing field.

Ferromagnetic substances are those which develop strong magnetization in the direction of the magnetizing field. Example : Manganese, aluminum , chromium, platinum, etc. So option 1 is not correct. So option 2 is not correct. Nickel is a Ferromagnetic material that is strongly attracted by a magnet. So option 3 is not correct. Gold is a diametric material, so it is repelled by magnets.

Hence option 4 is correct. Material A is diamagnetic and B paramagnetic. Additional Information Paramagnetic Substances : The substances which are weakly magnetized when placed in an external magnetic field, in the same direction of the applied field are called paramagnetic substances. Example : Sodium, aluminum, calcium, manganese, platinum Properties : These substances are attracted by a magnet Atomic orbitals of these substances are partially filled It develops weak magnetization in the direction of the applied magnetic field After removing the magnetizing field, it loses its magnetization When placed in a non-uniform magnetic field, it tends to move from weaker to stronger regions of the magnetic field When placed in a uniform magnetic field, it aligns itself in the direction of the magnetic field Magnetic susceptibility is a small positive value Relative permeability is close to one and always greater than 1 Magnetic permeability is slightly more compared to free space Download Solution PDF Share on Whatsapp.

CONCEPT : Magnetic susceptibility : The measurement of how much a magnetic material will be magnetized in a given magnetic field is called as magnetic susceptibility. Example : Manganese, aluminum, chromium, platinum, etc.

Paramagnetic materials: The magnetic materials which are weekly attracted by a magnet are called a paramagnetic substance. Answer Detailed Solution Below Option 4 : high susceptibility and high permeability. They are strongly attracted by a magnet and tend to move from the weaker to the stronger part of a magnetic field.

It is defined as the ratio of the intensity of magnetization M in a substance to the magnetic intensity H applied to the substance, i. It shows how magnetic material responds to the magnetic field. Answer: b magnetic viscosity and hysteresis. Answer: b rotate first and then expand.

Answer: b 2, 3 and 4 only. Answer: c Curie temperature. Answer: a large saturation magnetization. Answer: d ferrimagnetic. Answer: b diamagnetic substance. Answer: c 1 and 4. Answer: a 1 only. Answer: b 2 and 3. The permeability of ferromagnetic substance is much greater than 1.

Paramagnetic Diamagnetic Ferromagnetic All of the above. The atoms of diamagnetic substances have paired electrons. The given figure shows a diamagnetic specimen placed in an external magnetic field. Additional Information Paramagnetic substances: Paramagnetic substances are those substances that get weakly magnetized with the influence of an external magnetic field. Ferromagnetic materials : Ferromagnetic substances are those substances that get strongly magnetized when placed in an external magnetic field.

Paramagnetic Diamagnetic Ferromagnetic Antiferromagnetic. Diamagnetic materials Weak, negative susceptibility to magnetic fields Diamagnetic materials are slightly repelled by a magnetic field All the electrons are paired so there is no permanent net magnetic moment per atom Most elements in the periodic table, including copper, silver, and gold, are diamagnetic Key Points Classification Permanent dipoles Interaction between neighboring dipoles Diamagnetic No - Paramagnetic Yes Zero or Negligible Ferromagnetic Yes Parallel orientation Antiferromagnetic Yes The antiparallel orientation of equal moments Ferrimagnetic Yes The antiparallel orientation of unequal moments Download Solution PDF Share on Whatsapp.

Answer Detailed Solution Below Option 3 : negative and small. Therefore option 3 is correct. Answer Detailed Solution Below Option 4 : repelled by both the poles.

The correct answer is option 4 i. CONCEPT : Diamagnetic substance: Diamagnetic substances are those that are capable of freely getting magnetized when placed in an external magnetic field. The magnetization takes place in a direction that is opposite to the external magnetic field. When the diamagnet is at a distance from the bar magnet, the magnetic field deviates away from the diamagnet.

When the diamagnet is brought more closer to the bar magnet, the magnetic field of the bar magnet has no space to deviate but acts as if the end of the diamagnet is a like pole and repels. Hence, the diamagnet will get repelled by the poles of the bar magnet. Answer Detailed Solution Below Option 3 : does not vary with temperature. Since each atom of a diamagnetic substance has zero magnetic dipole moment, the temperature cannot affect the net magnetic moment in any way.

Answer Detailed Solution Below Option 3 : c. CONCEPT: Diamagnetic substances: Diamagnetic substances are those which develop feeble magnetization in the opposite direction of the magnetizing field. Therefore option 1 is correct. The magnetic moment of the two being equal and opposite , cancel each in the absence of an external magnetic field so that net magnetic each atom is zero.

Therefore option 4 is correct. Magnetic susceptibility of diamagnetic materials is small and negative i. Therefore option 3 is incorrect. Paramagnetic Diamagnetic Ferromagnetic Antiferromagnetic Ferrites. Paramagnetic substance Diamagnetic substance Ferromagnetic substance Superconductor. Diamagnetic substance. CONCEPT : Diamagnetic substance: Diamagnetic substances are those that are capable of weakly getting magnetized when placed in an external magnetic field.

This has happened as the induced magnetic dipole of the sample has developed an opposing magnetic field. In the figure, the direction of the magnetic field is from South to North and that of the induced magnetic field of the sample will be as if the left end of the sample has developed a North pole.

Now, like poles repel and the sample moves away towards the right side. Therefore, the sample is a diamagnetic substance.