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Full Portion Two Marks Study Materials

12th Standard

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Physics

Time : 01:00:00 Hrs
Total Marks : 50
    25 x 2 = 50
  1. What is an equipotential surface?

  2. Define ‘capacitance’. Give its unit.

  3. State microscopic form of Ohm’s law.

  4. Define temperature coefficient of resistance.

  5. What do you mean by internal resistance of a cell?

  6. Define draft velocity and write its relationship with the current flowing through it.

  7. State Coulomb’s inverse law.

  8. Write the Similarities between Coulomb's law and Biot-Savort's law.

  9. What are step-up and step-down transformers?

  10. Explain the use of transformers in long distance transmission of electric power.

  11. A graph of magnetic flux (Ф) versus current CI is shown for two inductors A & B, which has a larger value of self-inductance?

  12. (i) In which situation is there a displacement current but no conduction current?
    (ii) Find the displacement current across the plate of the capacitor whose charging current is 0.25 A.

  13. What is angle of deviation due to refraction?

  14. What are the sign conventions followed for lenses?

  15. What are the uses of spectrometer?

  16. Define centre of curvature.

  17. A ray of light incident on a concave lens becomes parallel to the principal axis after refraction. Show this situation with the help of a ray diagram.

  18. The stopping potential in an experiment on photoelectric effect is 2V. What is the maximum kinetic energy of the photoelectrons emitted?

  19. A proton and a deuteron have the same velocity, what is the ratio of their de Broglie wavelengths?

  20. Why neutrons in the nucleus are stable?

  21. Define energy band

  22. What is called output resistance?

  23. Write the advantages of PM?

  24. Which modulation is more advantageous? AM or FM? Why?

  25. Define nano solid?

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