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Class 12 Physics: Magnetism and Matter
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MCQs on bar magnet, magnetism and gauss law, earth magnetism, magnetisation, magnetic intensity, materials magnetic properties, permanent magnets and electromagnets.

Class 12 Physics: Magnetism and Matter
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25 Questions

1. Identify the expression for magnetic induction from the following.
2. Find the correct combination regarding relative permeability and magnetic susceptibility of a paramagnetic substance.
3. Which one of the following is feebly repelled by a magnet?
4. Identify the expression for Curie's constant from the following.
5. Give the SI unit of magnetic dipole moment.
6. Identify the expression for magnetic intensity from the following.
7. Identify the expression for horizontal component from the following.
8. What is the relation between angle of dip and magnetic latitude?
9. The angle of dip at a certain place on Earth is 30o and the magnitude of Earth's horizontal component of magnetic field is 0.35 G. Find the magnetic field at that place on Earth.
10. Which of the following is the definition for magnetic meridian of Earth?
11. Pick out the temperature at which iron becomes paramagnetic?
12. Pick out the unit of magnetic permeability.
13. Which of the following is not a basic property of magnets.
14. A magnetized needle of the magnetic moment 20 JT-1 is placed at 60o with the direction of the uniform magnetic field of magnitude 9 T. What is the torque acting on the needle?
15. Magnetic lines of force always form open loops. State true or false.
16. Which one of the following, when suspended freely, slowly sets itself parallel to the direction of the magnetic field?
17. Which of the following is a natural magnet?
18. Which of the following is not a consequence of Gauss's law?
19. A bar magnet of the magnetic moment 5 Am2 has poles 20 cm apart. Calculate the pole strength.
20. Which of the following is another term for magnetization?
21. Find the false statement.
22. A magnetic dipole of length 10 cm has pole strength of 20 Am. Find the magnetic moment of the dipole.
23. The line of force in a magnetic field represents the direction at each point that a magnetic needle placed at the point takes up. Do they also represent the direction of the force on a moving charge at each point?
24. Which among the following is the source of the magnetic field (magnetism)?
25. Pick out the expression for intensity of magnetization from the following.

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