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Sample 2 Mark Book Back Questions (New Syllabus) 2020

12th Standard EM

    Reg.No. :
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Physics

Time : 01:00:00 Hrs
Total Marks : 38

    Part A

    19 x 2 = 38
  1. Write a short note on superposition principle.

  2. Define ‘electric flux’.

  3. State macroscopic form of Ohm’s law.

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

  5. Define magnetic dipole moment.

  6. State Faraday’s laws of electromagnetic induction.

  7. How will you define Q-factor?

  8. Explain the concept of intensity of electromagnetic waves.

  9. What is relative refractive index?

  10. What is angle of deviation due to reflection?

  11. What is the reason for reddish appearance of sky during sunset and sunrise?

  12. Mention the differences between interference and diffraction.

  13. What are near point and normal focusing?

  14. Why do metals have a large number of free electrons?

  15. Write down the postulates of Bohr atom model.

  16. What is meant by radioactivity?

  17. What is the phase relationship between the AC input and output voltages in a common emitter amplifier? What is the reason for the phase reversal?

  18. What does RADAR stand for?

  19. Why steel is preferred in making Robots?

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