Magnetic Properties of Materials
Physics ⇒ Electricity and Magnetism
Magnetic Properties of Materials starts at 10 and continues till grade 12.
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See sample questions for grade 10
A student observes that a sample of copper is not attracted to a magnet. What type of magnetic material is copper?
A student places a bar of bismuth near a strong magnet and observes that it is repelled. What type of magnetic material is bismuth?
A transformer core is made of laminated soft iron. Explain why lamination is used.
Define ferromagnetism.
Describe the behavior of a paramagnetic material in an external magnetic field.
A student observes that a sample of copper is not attracted to a magnet. What type of magnetic material is copper?
A student places a bar of bismuth near a strong magnet and observes that it is repelled. What type of magnetic material is bismuth?
A transformer core is made of laminated soft iron. Explain why lamination is used.
Paramagnetic materials are:
(1) Strongly attracted by magnets
(2) Weakly attracted by magnets
(3) Strongly repelled by magnets
(4) Not affected by magnets
The relative permeability of a diamagnetic material is:
(1) Less than 1
(2) Equal to 1
(3) Greater than 1
(4) Much greater than 1
Which of the following is a property of ferromagnetic materials?
(1) They have low retentivity
(2) They have high permeability
(3) They are always non-metals
(4) They are not affected by temperature
Which of the following is a soft magnetic material?
(1) Steel
(2) Iron
(3) Cobalt
(4) Nickel
Fill in the blank: Ferromagnetic materials have __________ magnetic susceptibility.
Fill in the blank: The process of aligning the magnetic domains in a material is called __________.
Fill in the blank: The SI unit of magnetic permeability is __________.
Materials that are weakly repelled by a magnetic field are called __________ materials.
True or False: All materials are magnetic.
True or False: Alloys like Alnico are used to make permanent magnets.
True or False: Ferromagnetic materials can be permanently magnetized.
True or False: Magnetic domains are regions within a material where the magnetic moments are aligned in the same direction.
