Rankers Physics

Magnetic Properties of Matter: Practice Problem & Solution

The materials suitable for making electromagnets should have :
High retentivity and high coercivity
Low retentivity and low coercivity
High retentivity and low coercivity
Low retentivity and high coercivity

No solution provided for this question.

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Your email address will not be published.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. 25. If the magnetic dipole moment of an atom of diamagnetic material, paramagnetic material and ferromagnetic material are denoted by $\mu_{d}$, $\mu_{p}$ and $\mu_{f}$ respectively, then (2005)
2. 7. A bar magnet is hung by a thin cotton thread in a uniform horizontal magnetic field and is in equilibrium state. The energy required to rotate it by $60^{\circ}$ is $W$. Now the torque required to keep the magnet in this new position is: (2016 - II)
3. 14. A vibration magnetometer placed in magnetic meridian has a small bar magnet. The magnet executes oscillations with a time period of $2text{ sec}$ in earth's horizontal magnetic field of $24text{ microtesla}$. When a horizontal field of $18text{ microtesla}$ is produced opposite to the earth's field by placing a current carrying wire, the new time period of magnet will be: (2010 Pre)
4. 22. There are four light weight rod samples A, B, C, D separately suspended by threads. A bar magnet is slowly brought near each sample and the following observations are noted: (i) A is feebly repelled (ii) B is feebly attracted (iii) C is strongly attracted (iv) D remains unaffected Which one of the following is true? (2011 Pre)
5. 6. A 250 turn rectangular coil of length $2.1\text{ cm}$ and width $1.25\text{ cm}$ carries a current of $85\text{ }\mu\text{A}$ and subjected to a magnetic field of strength $0.85\text{ T}$. Work done for rotating the coil by $180^\circ$ against the torque is: (2017-Delhi)