Magnetic Properties and Heating – Rankers Physics

Magnetic Properties of Matter: Practice Problem & Solution

Assertion (A): The properties of paramagnetic and ferromagnetic substances are not affected by heating. Reason (R): As temperature changes, the alignment of molecular magnets does not change.  
(1) Both (A) & (R) are true and the (R) is the correct explanation of the (A)
(2) Both (A) & (R) are true but the (R) is not the correct explanation of the (A)
(3) (A) is true but (R) is false
(4) Both (A) and (R) are false

Short Solution (Best for NEET):

To solve this problem, we apply the core principles of Magnetic Properties of Matter. Understanding the underlying formula is key to arriving at the correct answer below:

The magnetic properties of paramagnetic and ferromagnetic substances are strongly affected by temperature. Paramagnetic susceptibility is temperature-dependent (Curie's Law), and ferromagnets become paramagnets above their Curie temperature. Thermal agitation due to heating disorients molecular magnets. Both Assertion (A) and Reason (R) are false.

Leave a Reply

Your email address will not be published. Required fields are marked *

Similar Practice Questions

Explore conceptually related problems to test your knowledge.

1. 30. Curie temperature is the temperature above which: (2008)
2. A current carrying coil is subjected to a uniform magnetic field. The coil will orient so that its plane becomes : (1988)
3. A current loop in a magnetic field : (2013)
4. In crossed electric and magnetic field, the velocity of charged particle which passes undeflected through the region may be (where \(E\) is electric field and \(B\) is magnetic field)
5. An electron having mass '$m$' and kinetic energy E enter in uniform magnetic field B perpendicularly, then its frequency will be: (2001)