XII STANDARD PHYSICS IMPORTANT QUESTIONS 2014
LEAD BY KNOWLEDGE COACHING CENTRE & TUTORIAL
Weightage to various units (chapters)
Unit Mark
1. Electrostatics 25
2. Current electricity 20
3. Effects of electric current 20
4. Electromagnetic induction and alternating current 25
5. Electromagnetic waves and wave optics 25
6. Atomic physics 25
7. Dual nature of radiation and matter – Relativity 15
8. Nuclear physics 25
9. Semiconductor devices and their applications 30
10. Communication Systems 20
Total Mark (including choice) 230
Unit Mark
1. Electrostatics 25
2. Current electricity 20
3. Effects of electric current 20
4. Electromagnetic induction and alternating current 25
5. Electromagnetic waves and wave optics 25
6. Atomic physics 25
7. Dual nature of radiation and matter – Relativity 15
8. Nuclear physics 25
9. Semiconductor devices and their applications 30
10. Communication Systems 20
Total Mark (including choice) 230
PART - IV MARKS 40
1. State Gauss' law. Applying this, calculate electric field due to (i) an infinitely long straight charge with uniform charge density (ii) an infinite plane sheet of charge q.
2. State the principle and explain the construction and working of Van de Graaff generator.
3. Prove that the energy stored in a parallel plate capacitor is q2/2c
4. Derive an expression for electric field due to an electric dipole (a) at a point on its axial line (b) at a point along the equatorial line
5. Explain Joule's calorimeter experiment to verify Joule's law of heating.
6. Explain in detail the principle, construction and theory of a tangent galvanometer
7. Deduce an expression for the force on a current carrying conductor placed in a magnetic field.
8. Obtain an expression for the magnetic induction at a point due to an infinitely long straight conductor carrying current.
9. Describe the principle, construction and working of three-phase a.c. generator.
10. State Lenz's law and illustrate through an experiment. Explain how it is in accordance with the law of conservation of energy.
11. Explain the principle of transformer, Discuss its construction and working.
12.Applying Biot- Savart law, obtain an expression for the magnetic induction at a point due to infinitely long straight conductor carrying current.
13. Describe the principle, construction and working of a single – phase a.c generator
14.A source of altemating emf is connected to a series combination of a resistor R an inductor L and a capacitor C. Obtain with the help of a vector diagram and impedance diagram, an expression for
(i) the effective voltage (ii) the impedance (iii) the phase relationship between the current and the voltage
15. Explain Raman scattering of light with the help of energy level diagram.
16. What is Raman effect? Explain Raman spectrum with diagram.
17. on the basis of wave theory, explain total internal reflection.
18. Give the source and use of electromagnetic waves
19. on the basis of wave theory, explain toral internal reflection. write the conditions for the total internal reflection.
20. Obtain the expression of the radius of nth orbit of an electron based on bohr's theory.
21. How will you determine the wavelength of X-rays using Bragg sprectometre? write any five properties of X- rays
22. State Bohr's postulates. Obtain an expression for the radius of nth orbit of hydrogen atom.
23. What are cosmic rays? Explain the latitude effect of cosmic rays.
24. What is a nuclear reactor? Explain the functions of moderator, control rods and nuclear reflecotr. Mention the uses of nuclear reactor.
25. What is rectification? Explain the working of a bridge rectifier with necessary waveforms.
26. Sketch the circuit of a Colpitts oscillator and explain its working.
27. With the help of block diagram, explain the function of monochrome TV receiver.
28. Explain the construction and working of a Geiger-Muller counter.
2. Write a note on pile of plates
3. Explain the spectral series of hydrogen atom without diagram.
4. Obtain Einstein's photoelectric equation.
5. Explain FitzGerald-Lorentx contraction with an example
6. Define mobility. Establish a relation between drift velocity and current
7. Obtain the condition for bridge balance in Wheatstone bridge.
8. State and verify Faraday's second law of electrolysis.
9. State and Prove Brewster law.
10. Mention any five Properties of X-rays
11. Explain time-dilation with an example
12. What are the reason for various energy loses in a transformer? Explain how thy can be minimized.
13. Explain space wave propagation of radio waves.
14. Write any five applications of photoelectric cells.
15. Write the properties of lines of forces.
16. Derive an expression for de Brogelie wavelength of matter waves.
17. How will you compare the e.m.f.s of two cells using a potentiometer?
18. Explain how a cosmic ray shower is formed
13. Describe the principle, construction and working of a single – phase a.c generator
14.A source of altemating emf is connected to a series combination of a resistor R an inductor L and a capacitor C. Obtain with the help of a vector diagram and impedance diagram, an expression for
(i) the effective voltage (ii) the impedance (iii) the phase relationship between the current and the voltage
15. Explain Raman scattering of light with the help of energy level diagram.
16. What is Raman effect? Explain Raman spectrum with diagram.
17. on the basis of wave theory, explain total internal reflection.
18. Give the source and use of electromagnetic waves
19. on the basis of wave theory, explain toral internal reflection. write the conditions for the total internal reflection.
20. Obtain the expression of the radius of nth orbit of an electron based on bohr's theory.
21. How will you determine the wavelength of X-rays using Bragg sprectometre? write any five properties of X- rays
22. State Bohr's postulates. Obtain an expression for the radius of nth orbit of hydrogen atom.
23. What are cosmic rays? Explain the latitude effect of cosmic rays.
24. What is a nuclear reactor? Explain the functions of moderator, control rods and nuclear reflecotr. Mention the uses of nuclear reactor.
25. What is rectification? Explain the working of a bridge rectifier with necessary waveforms.
26. Sketch the circuit of a Colpitts oscillator and explain its working.
27. With the help of block diagram, explain the function of monochrome TV receiver.
28. Explain the construction and working of a Geiger-Muller counter.
PART III (5- Marks)
1. State and prove de Morgan's theorems.
2. Write a note on pile of plates
3. Explain the spectral series of hydrogen atom without diagram.
4. Obtain Einstein's photoelectric equation.
5. Explain FitzGerald-Lorentx contraction with an example
6. Define mobility. Establish a relation between drift velocity and current
7. Obtain the condition for bridge balance in Wheatstone bridge.
8. State and verify Faraday's second law of electrolysis.
9. State and Prove Brewster law.
10. Mention any five Properties of X-rays
11. Explain time-dilation with an example
12. What are the reason for various energy loses in a transformer? Explain how thy can be minimized.
13. Explain space wave propagation of radio waves.
14. Write any five applications of photoelectric cells.
15. Write the properties of lines of forces.
16. Derive an expression for de Brogelie wavelength of matter waves.
17. How will you compare the e.m.f.s of two cells using a potentiometer?
18. Explain how a cosmic ray shower is formed
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