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Standard XII
Physics
Magnetic Susceptibility
Question

A ferromagnetic material is placed in an external magnetic field. The magnetic domains
  1. Increase in size
  2. Decrease in size
  3. Have no relation with the field
  4. May increase or decrease is size

A
Increase in size
B
Decrease in size
C
May increase or decrease is size
D
Have no relation with the field
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Solution
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Q1
A ferromagnetic material is placed in an external magnetic field. The magnetic domains
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(b) decrease in size
(c) may increase or decrease in size
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Q2
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Q4

The strength of a current-carrying solenoid decreases with a rise in its temperature.

Concept Used:

The magnetic field and dependence on temperature

Step 1:

The magnetic field strength depends on temperature. The magnetic field strength decreases with an increase in temperature. With an increase in temperature, there is a misalignment in the domains. This decreases the magnetic field strength.

So, the statement in the given question is true.


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Q5
A paramagnetic material is kept in a magnetic field. The field is increased till the magnetisation becomes constant. If the temperature is now decreased, the magnetisation
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