www.upes.ac.in 12Th Board Mock Test Physics : University of Petroleum and Energy Studies

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Name of the Organisation : University of Petroleum and energy studies(upes.ac.in)
Type of Announcement : 12Th board Mock test for Physics
Home Page : http://upes.ac.in/

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Mock Test for Physics

Tamil Nadu Pre-board Class XII

Part - I

General Instructions:
1. Answer all the questions.
2. Choose and write the correct answer.
3. Each question carries one mark
Choose the best answer :
1. At what point on line joining two point charges of magnitude +9q and +q
respectively, placed 40 cm apart, is the electric field zero?
(a) 30 cm from charge +9q
(b) 15 cm from charge +q
(c) 7.5 cm from charge +q
(d) 5 cm from charge +q
2. In an LCR series resonant circuit, the resonant frequency can be increased by
(a) decreasing R or L
(b) decreasing C or R
(c) decreasing L or C
(d) increasing C or R
3. The spectral lines of hydrogen in the visible region are called ……………….
(a) Balmer series
(b) Lyman series
(c) Paschen series
(d) Pfund series
4. According to the laws of Boolean algebra, the expression A(A+B) is equal to …………..
(a) A
(b) A+B
(c) B
(d) A
5. The half life period of a certain radioactive element with disintegration constant 0.1386 per day is ……………
(a) 10 days
(b) 14 days
(c) 5 days
(d) 1.4 days
7. In photoelectric effect, the photoelectric current ……………………………
(a) varies linearly with the frequency of incident light
(b) varies exponentially with the frequency of incident light
(c) decreases with increasing intensity of incident light
(d) increases with increasing intensity of incident light
8. In Young’s experiment, the fourth bright band for wavelength of light 3000 A coincides with the fifth bright band for another source in the same arrangement. The wavelength of another source is …………..
(a) 3000 oA
(b) 2400 oA
(c) 4000 oA
(d) 2800 oA
9. The refractive index of the medium, for polarizing angle 600 is ………….
(a) 1.5
(b) 1.00
(c) 1.468
(d) 1.732
10. The transmitter generates ………………..
(a) pulses
(b) periodic pulses
(c) periodic pulses of short duration
(d) periodic pulses of very short duration

Part- II

Answer any 15 questions :
11. Define electric line of force.
12. What is the difference between interference and diffraction?
13. Distinguish between inertial frame and non-inertial frame.
14. What are primary cells? State examples
15. Two rails of a railway track insulated from each other and the ground are connected to a Milli volt meter. The train runs at a speed of 180 km/hr. Vertical component of earth’s magnetic field is 0.2 x 10-4 Wb/m2 and the rails are separated by 1m. Find the reading of the voltmeter.
16. Distinguish electromotive force from potential difference.
17. State Gauss’s law.
18. Define Thomson coefficient.
19. What are nuclear forces? How do they arise?
20. In Newton’s rings experiment the diameter of certain order of dark ring is measured to be double that of the second ring. What is the order of the ring?

Part - III

General Instructions:

1. Answer the question 60 compulsory.
2. Of the remaining 11 questions, answer any six questions.
3. Draw diagrams wherever necessary

21. State the applications of superconductors.
22. Explain the action of the following secondary cell. (i) lead acid accumulator.
23. Two straight infinitely long parallel wires carrying equal currents and placed at a distance of 20 cm apart in air experience a mutually attractive force of 4.9 x 10-5 N per unit length of the wire. Calculate the current.
24. Derive an expression for Q-factor.
25. What are Newton’s rings? Why the centre of the Newton’s rings is dark?
26. Write the properties of cathode rays.
27. State the laws of photoelectric emission.
28. Describe Hallwach’s experiment dealing with photoelectric effect.
29. Describe the construction and operation of zener diode.
30. Explain the function of FM super heterodyne receiver

Part - IV

General Instructions:

1. Answer any four questions in detail.
2. Draw diagrams wherever necessary

31. Derive an expression for the electric potential at a point due to an electric dipole. Discuss the special cases.
32. Define Ampere’s circuital law. Applying it, find the magnetic induction due to a long solenoid carrying current.
33. In an a.c. circuit containing a capacitor, the instantaneous e.m.f. is e = Eo sin ? t.obtain the expression for instantaneous current. Explain the phase relation between e.m.f. and current by graph.
34. Derive an expression for bandwidth of interference fringes in Young’s double slit experiment.
35. Draw a neat sketch of Ruby Laser. Explain its working with the help of energy level diagram.

See more Question click here : upes.ac.in/pdf/TN_physics_XII_Preboard_Questions.pdf
If you want answer key for Physics Paper click here : upes.ac.in/pdf/TN_physic_XII_Preboard_Solutions.pdf

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