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Class 12 Physics (Part I) Chapter 5 Magnetism And Matter Quiz 2 (25 MCQs)

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1. An electron moving around the nucleus with an angular momentum l has a magnetic moment.
2. What happens when like poles of two magnets are brought together?
3. The magnetic needle kept in a non-uniform magnetic field can experience
4. The magnetic field of earth is due to:
5. The domain formation is a necessary feature of
6. The outer core is in which state of matter?
7. Which of the following properties shows the property of ferromagnetic substances?
8. BOHR MAGNETON IS GIVEN BY
9. Magnetic moment of an electron is
10. A magnetic bar of M magnetic moment is placed in the field of magnetic strength B, the torque acting on it is:
11. Which magnetic materials have negative susceptibility?
12. The winding of wire around a core which is connected to a source of energy is called the ..... coil.
13. A small magnet is pivoted to move freely in the magnetic meridian. At what place on the surface of the earth will the magnet be vertical?
14. A capacitor is charged by a constant current of 4.0 mA for 0.80 s. If the potential difference across the capacitor is 320 V, what is the capacitance of the capacitor?
15. A stationary magnet doesn't interact with
16. Hard magnets have
17. The susceptibility of a diamagnetic material does not depend on temperature
18. Two unlike magnetic poles of strength 10 A-m each are held in air at a distance of 0.10 m from each other. What is the magnetic force of attraction between them?
19. The time period of a thin bar magnet in earth's magnetic field is T. If the magnet is cut into two equal parts perpendicular to its length, the time period of each part in the same field will be
20. Can iron filings stick to a magnet?
21. When freely suspended, a magnet comes to rest in the direction:
22. Earth's magnetic field inside a closed iron box, as compared to outside is
23. A parallel-plate capacitor of cross-sectional area A is connected across a battery of potential difference V. A dielectric is then inserted into the capacitor. If the relative permittivity of the dielectric is 2.5 and the distance of separation between the plates is 0.050 mm, calculate the ratio of charge on the capacitor without the dielectric to the charge on the capacitor with dielectric.
24. A rod of L, along east-west direction is dropped from a height H. If B be the magnetic field due to the earth at that place and angle of dip is $\theta$
25. How can magnetic fields be used in medical imaging?
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