Who discovered superconductivity in 1911?

A. Kamerlingh Onnes

B. Alex Muller

C. GeoryBednorz

D. Charles Coulomb

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  1. The relation between absolute permittivity of air ( 0)a absolute p and velocity of light (c) is given…
  2. If the value of 25 of a conductor is 1/230 per oCa then the value of 0is
  3. One of the common application of an air- cored choke.
  4. Electric potential is a _______ quantity.
  5. Theory of ferromagnetic phenomena which assumes each atom is a permanent magnet which can turn freely…
  6. The physical motion resulting from the forces of magnetic fields is called
  7. A positively charged body has
  8. The magnetic field of a magnetized iron bar when strongly heated
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    When the current flowsa the magnetic field . conductor is in what direction?
  10. The unit of flux is _____ in cgs system.
  11. The phenomenon by which a magnetic substance becomes a magnet when it is place near a magnet
  12. What determines the value of the temperature coefficient of resistance of a material?
  13. Refers to the magnetic lines
  14. The greater percentage of materials is _________.
  15. The permeability of permalloy is
  16. The reluctance of a magnetic circuit varies with
  17. If on looking at any one end of a solenoid; the direction of current flow is found to be clockwise then…
  18. The contribution to the ionization in an ionization chamber by electrons liberated from t he walls.
  19. If you hold the conductor with right hand so that the stretched thumb points in the direction of the…
  20. Which of the following electric quantities is vector in character?
  21. Permanent magnets can be found in
  22. A magnetic material losses its ferromagnetic properties at a point called
  23. In electro-mechanical conversion devices like generators and motors the reason why a small air gap is…
  24. Referred to as the specific reluctance of a material
  25. Under ordinary conditionsa a body is considered
  26. The magnetic field around the conductor is determined by the
  27. Electron is a Greek word for
  28. The core of a transformer heats up when its primary is fed from an ac source because of
  29. The magnetic flux of 2000 lines is how many Maxwells?
  30. Electric field intensity is a ________.