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Intermediate 2nd Year
PHYSICS: PAPER-II
Model Paper - 3
TIME: 3 Hours
Max.Marks: 60
SECTION - A (10 × 2 = 20)
Note:
i) Answer all the questions.
ii)Every correct answer carries two marks
iii)All are Very Short Answer Type questions.
Define critical angle. Mention its relationship with refractive index?
The angles of deviations for violet and red colors of a crown prism are 5.23o and 5.15o
respectively. Find the dispersive power of the prism?
3. State inverse square law in magnetism and mention the mathematical expression?
4. What is the difference between electric lines of force and magnetic lines of induction?
5. What is internal resistance of a cell? Write the value of internal resistance of an ideal cell?
6. What are ohmic and non ohmic devices? Give examples?
7. Can X-ray producing photoelectric effect? Calculate the work function of a metal
production photo electrons with X-rays of wavelength 1Ao?
8. Neutrons are the best projectiles of produce nuclear reactions. Why?
9. What is thermal neutron? What is its importance?
10. Mention the basic methods of modulation?
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SECTIONS - B (6 × 4 = 24)
A
Note :
i) Answer any six questions.
ii) Every correct answer carries 4 marks.
iii) All are Short Answer Type questions.
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11. Distinguish between an astronomical telescope and a terrestrial telescope?
12. Derive an expression for the period of oscillation of a bar magnet in vibration
magnetometer?
13. Define capacitance or capacity of a conductor and explain the principle of capacitor?
14. Explain the principle of meter bridge. Describe an experiment for the determination of
unknown resistance of a wire?
15. Explain construction and working of Dud dell's thermo galvanometer?
16. Obtain an expression for the torque on a loop placed in a uniform magnetic field. Describe
the construction and working of moving coil galvanometer?
17. Describe the origin of X-ray spectra. Explain continuous and characte-ristic x-ray
spectrum?
18. Write a note on 'Breeder reactor'?
SECTION - C (2 × 8 = 16)
Note:
i) Answer any two questions.
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ii) Every correct answer carries 8 marks
iii) All are Long Answer Type questions.
19. State laws of transverse vibrations in stretched strings. Explain how do you verify them
using sonometer.
A string vibrates with frequency 200Hz. Its length is increased to 4/3 times the initial length
and tension is adjusted till the string vibrates with frequency 300 Hz. What is the ratio of
the new tension to the original tension?
20. State and explain Kirchhoff's law in electricity and apply them to Wheatstone bridge to
obtain its balancing condition?
21. Describe a transistor and explain its working?
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