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• Magnetic moment of solenoid does not change when iron rod is inserted in it
* Magnetic moment of Bar magnet is reduced if temperature is increased
Magnetic moment of toroid'is directed along radial direction
Magnetic moment of current loop is independent of material of loop.
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magnetic moment of bar magnet is reduced if temprature is increased this line of sentence is right {®}
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The magnetic moment is defined as the property of the material which interacts with the applied field.
It is generally given as M=2ml
Where l= length of the material
m= magnetisation of the material.
Here the incorrect answer is Magnetic moment of solenoid does not change when iron rod is inserted in it.
When an iron core is put inside a solenoid,
It's dipole aligns with the dipole of the solenoid.
Hence, the total magnetic moment of the solenoid increases.
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