Electromagnetic Induction and Alternating Current Two Marks Questions

12th Standard EM

    Reg.No. :
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Physics

Time : 00:45:00 Hrs
Total Marks : 30
    15 x 2 = 30
  1. How is Eddy current produced? How do they flow in a conductor?

  2. Mention the ways of producing induced emf.

  3. Give the principle of AC generator.

  4. List out the advantages of stationary armature-rotating field system of AC generator.

  5. What do you mean by resonant frequency?

  6. What is meant by wattles current?

  7. What are LC oscillations?

  8. Define Magnetic Flux.

  9. Distinguish between AC and DC.

  10. When does the phenomenon of resonance is possibble in the circuit?

  11. State the law that gives the polarity of the induced emf.

  12. A bar magnet is moved in the direction indicted by the arrow between two coils PQ and CD predict the directions of induced current in each coil.

  13. A rectangular loop of wire is moved within the region of a uniform magnetic field acting perpendicular to its plane. What is the direction and magnitude of current induced in it?

  14. The motion of copper plate is damped when it is allowed to oscillate between the two poles of a magnet what is the cause of this damping?

  15. What is phasort

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