EASY
12th CBSE
IMPORTANT
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A uniform magnetic field gets modified as shown below when two specimens and are placed in it. Identify whether specimens and are diamagnetic, paramagnetic or ferromagnetic.
Important Questions on Magnetism
EASY
12th CBSE
IMPORTANT
A uniform magnetic field gets modified as shown below, when two specimens and are placed in it. State the reason for the behaviour of the field lines in and for diamagnetic, parmagnetic substances.
EASY
12th CBSE
IMPORTANT
How will a dia-, para- and a ferromagnetic material behave when kept in a non-uniform external magnetic field ? Give two examples of each of these materials. Name two main characteristics of a ferromagnetic material which help us to decide its suitability for making a permanent magnet.
EASY
12th CBSE
IMPORTANT
How will a dia-, para- and a ferromagnetic material behave when kept in a non-uniform external magnetic field ? Give two examples of each of these materials. Name two main characteristics of a ferromagnetic material which help us to decide its suitability for making an electromagnet. Which of these two characteristics should have high or low values for each of these two types of magnets ?
EASY
12th CBSE
IMPORTANT
Name materials, one in each case, which are suitable for a permanent magnet. Justify your answer.
EASY
12th CBSE
IMPORTANT
Name materials, one in each case, which are suitable for core of an electric transformer. Justify your answer.
EASY
12th CBSE
IMPORTANT
Name the three types of magnetic materials which behave differently when placed in a non-uniform magnetic field. Give two properties for each of them.
EASY
12th CBSE
IMPORTANT
Why does a paramagnetic substance display greater magnetisation for the same magnetising field when cooled ? How does a diamagnetic substance respond to similar temperature changes?
EASY
12th CBSE
IMPORTANT
Three identical specimens of magnetic materials Nickel, Antimony, Aluminium are kept in a uniform magnetic field. Draw the modification in the field lines in each case. Justify your answer.
