FERROMAGNETIC SUBSTANCES

Assertion: The ferromagnetic substance do not obey Curie's law. Reason: At Curie point a ferromagnetic substance start behaving as a paramagnetic subsrance.

Assertion : On beating ferromagnetic or ferromagnetic substance , they become paramagnetic Reason The electrons change their spin on heating

A: Above curie-point a ferromagnetic substance behaves as a paramagnetic substance. R: Magnetic susceptibility of a diamagnetic substance increases with rise in temperature.

Assertion : The properties of paramagnetic and ferromagnetic substance are not effected by heating. Reason : As temperature rises, the alignment of molecular magnets gradually decreases.

Statement I : A ferromagnetic substance becomes a permanent magnet, when it is placed in a magnetic field. Statement II : All the domains get oriented in the direction of magnetic field.

With the help of electron spins, clearly distinguish between Ferromagnetic, Antiferromagnetic and Ferrimagnetic substances.

Statement I : The ferromagnetic property depends on temperature. At high temperature, ferromagnet becomes paramagnet. Statement II : At high temperature, the domain wall area of a ferromagnetic substance increases. In the light of the above statements, choose the most appropriate answer from the options given below :

Assertion : If some ferromagnetic substance is filled inside a solenoid, its coefficient of self induction L will increase. Reason : By increasing the current in a coil, its coefficient of self induction L can be increased.

Needles N_(1) , N_(2), and N_(3) are made of a ferromagnetic, a paramagnetic and a diamagnetic substance respectively . A magnet when brought close to them will

Ferromagnetism is in