Magnetic Properties of Materials
Physics ⇒ Electricity and Magnetism
Magnetic Properties of Materials starts at 10 and continues till grade 12.
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A bar of iron is placed in a uniform magnetic field. Describe what happens to the magnetic domains inside the iron bar.
A material has a relative permeability slightly greater than 1. What type of magnetic material is it?
A sample of bismuth is placed near a strong magnet and is observed to move away from the magnet. What does this indicate about the magnetic property of bismuth?
A sample of material is placed in a magnetic field and is found to be weakly repelled. What type of magnetic material is it most likely to be?
Define magnetic permeability.
A bar of iron is placed in a uniform magnetic field. Describe what happens to the magnetic domains inside the iron bar.
A sample of bismuth is placed near a strong magnet and is observed to move away from the magnet. What does this indicate about the magnetic property of bismuth?
Consider two identical solenoids, one filled with a ferromagnetic material and the other with a paramagnetic material. If the same current is passed through both, which solenoid will produce a stronger magnetic field inside, and why?
Which of the following best describes the alignment of atomic magnetic moments in a ferromagnetic material?
(1) Randomly aligned
(2) Aligned parallel in domains
(3) Aligned antiparallel
(4) Perpendicular to each other
Which of the following is a property of paramagnetic materials?
(1) They have a large positive susceptibility
(2) They are strongly attracted by magnets
(3) Their magnetization is proportional to the applied field
(4) They are not affected by magnetic fields
Which of the following is NOT a characteristic of ferromagnetic materials?
(1) High retentivity
(2) High coercivity
(3) Negative susceptibility
(4) Presence of magnetic domains
Which of the following is NOT a magnetic property of materials?
(1) Magnetic susceptibility
(2) Electrical resistivity
(3) Permeability
(4) Retentivity
Fill in the blank: The ability of a material to retain its magnetization after the removal of the magnetizing field is called __________.
Fill in the blank: The magnetic field inside a solenoid filled with a paramagnetic material is __________ than that of an empty solenoid.
Fill in the blank: The process of making a material lose its magnetization is called __________.
Fill in the blank: The SI unit of magnetic susceptibility is __________.
A material has a high value of coercivity. Is it suitable for making permanent magnets?
State whether the following statement is true or false: Diamagnetic materials are repelled by both poles of a magnet.
State whether the following statement is true or false: Ferromagnetic materials can be permanently magnetized.
True or False: All materials are affected by magnetic fields to some extent.
