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

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1. At a temperature higher than Curie temperature, ferromagnetic substance behaves to as paramagnetic substance
2. Magnetic susceptibility of a material is-0.05. The magnetic nature if material is
3. Soft iron is used in making permanent magnets
4. To make electromagnet, substance should be
5. In a mass spectrometer, charged particle moves in straight line before leaving the region in the velocity selector. Then it moves in ..... when the charged particle enter a magnetic field region after passing through the velocity selector.
6. Ratio of total intensity of magnetic field at equator to poles is
7. A magnet in the core of earth can not be the source of earth's magnetism because:
8. Steel is used in electromagnetic cranes.
9. What is the value of angle of dip at the magnetic equator?
10. What are the characteristics of diamagnetic materials?
11. What is the name of the phenomenon where a material becomes magnetized when placed in a magnetic field?
12. Which statement is true about water changing from a liquid to gas?
13. From question 16:The plates of a parallel-plate capacitor are 2.50mm apart, and each carries a charge of magnitude 80.0nC. The plates are in vacuum. The electric field between the plates has a magnitude of 4.00x10$^{6}$V/m. What is the area of each plates?
14. In a permanent magnet at room temperature
15. What is the term for the process of aligning the magnetic domains in a ferromagnetic material?
16. At present, north magnetic pole is located at a place in:
17. If rod temds to move from weaker to stronger field, then nature of material
18. In the capacitor, the dielectric can be made out of all sorts of ..... materials and the plates are made of a ..... material.
19. Two magnets have the same length and the same pole strength, but one of the magnets has a small hole at is center.then
20. Magnetic susceptibility of diamagnetic substances is
21. What is the area around a magnet where magnetic forces can be felt called?
22. What is the unit of magnetic field strength?
23. A current loop placed in a magnetic field behaves like a
24. A current carrying loop is placed in a uniform magnetic field in four different orientations as shown in figure. Arrange them in the decreasing order of potential energy.
25. A dip circle is so set that it moves freely in the magnetic meridian. The angle of dip is 40$^\circ$. Now the dip circle is rotated so that the plane in which the needle moves makes an angle of 30$^\circ$ with the magnetic meridian. In this position, the needle will dip by the angle
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