Sunday, 18 November 2018

JKBOSE 12th Physics Paper 2017

JKBOSE 12th Physics Paper 2017 has a total of 21 questions which include long answer type, short answer type, very short answer type and objective type questions. The maximum time allotted is 3 hours. You can also check JKBOSE 12th Physics Paper 2018 on our website. Below is the complete JKBOSE 12th Physics Paper 2017:

(Long Answer Type Questions)-(5 marks each)

1. Derive an expression for the torque experienced by an electric dipole placed in a uniform electric field. What is the net force/ acting on this electric dipole?
Or
Define the capacitance of a capacitor. Give its S. I. Unit, Derive an expression for the electrostatic energy stored in a charged capacitor.

2. What are diamagnetic, paramagnetic and ferromagnetic materials? Discuss their important properties.
Or
Describe the principle, construction and working of moving coil galvanometer.

3. Derive an expression for average Power in LCR series circuit Connected to AC Supply. Hence define Power factor.
Or
Give the principle, construction, theory and working of A. C. generator.

4. State Huygen's principle and prove the laws of reflection on its basis.
Or
With the help of a ray diagram, explain the working of a compound microscope. Derive an expression for its magnifying Power.

(Short Answer Type Questions)-(3 marks each)

5. What is meant by equipotential surface? Give two properties of the equipotential surface.
6. Establish the relation between drift velocity of electrons and electric current.
7. A 220 V-100 Watt bulb is connected to 100 V source. Calculate the  power consumed by the bulb,
8. How will you convert a galvanometer into Voltmeter?
9. Write the characteristics of electromagnetic waves.
10. State and explain Brewster's law of Polarization.
11. Calculate the speed of light in a medium whose critical angle is 300.
12. Explain with the help of a circuit diagram how a Zener diode can be used as a voltage regulator.

(Very Short Answer Type Questions)-(2 marks each)

13. Find the capacitive reactance of 10 pf capacitor when it is a part of a circuit whose frequency is 100 Hz.
14. Define modulation. What are the elements of a basic communication system?
15. Write four uses of Polaroids.
16. Describe space wave propagation.
17. Define work function and give its S. I. Units.
18. Define binding energy. Sketch the graph between binding energy per nuclear and mass number.
19. What are the limitations of Bohr's atomic model?
20. Give the logic symbol and truth table for NOT gate.

(Objective Type Questions)-(1 mark each)

21. (i) What is demodulation?
     (ii) Define atomic mass unit.
    (iii) Define 'forbidden energy gap'.
    (iv) A wavefront is propagated ........
     (v) The intensity of light depends upon the ..... present in light.
Choose the correct answer:
    (vi) Ampere-hour is the unit of:
           (a) The quantity of change.
           (b) The strength of the current.
           (c) Power.
           (d) Energy.
   (vii) What is increased in step down transformer?
           (a) Voltage.
           (b) Current.
           (c) Wattage.
           (d) None of the above.
  (viii) Which one among the following shows particle nature of light?
          (a) Polarization.
          (b) Interference.
          (c) Refraction.
          (d) Photoelectric effect.
    (ix) The size of the atomic nucleus is of the order of:
          (a) 10 power -15 m.
          (b) 10 power -10 m.
          (c) 10 power 14 m.
          (d) 10 power 10 m.
     (x) In NPN Transistor, the maximum current passes through:
         (a) Collector.
         (b) Emitter.
         (c) Base.

         (d) Same in all.

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