Rankers Physics

Magnetic Properties of Matter: Practice Problem & Solution

24. If a diamagnetic substance is brought near the north or the south pole of a bar magnet, it is: (2009)
Repelled by the north pole and attracted by the south pole
Attracted by the north pole and repelled by the south pole
Attracted by both the poles
Repelled by both the poles

Solution Explained:

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:

Diamagnetic substances always move from stronger parts to weaker parts of a non-uniform magnetic field. Therefore, they are repelled by both the north and south poles of a bar magnet.

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Your email address will not be published.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. Assertion (A): If a proton and an \( \alpha \)-particle enter a uniform magnetic field perpendicularly, with the same speed, then the time period of revolution of the \( \alpha \)-particle is double than that of proton. Reason (R): In a magnetic field, the time period of revolution of a charged particle is directly proportional to mass.  
2. A particle of mass \(M\) and charge \(Q\) moving with velocity \(\vec{v}\) describes a circular path of radius \(R\) when subjected to a uniform transverse magnetic field of induction \(B\). The work done by the field when the particle completes one full circle is:
3. Assertion (A): The Lorentz force is a non-conservative force. Reason (R): The work done by the Lorentz force is always zero.  
4. 29. Electromagnets are made of soft iron because soft iron has: (2010 Pre)
5. 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)