Who discovered superconductivity in 1911?

A. Kamerlingh Onnes

B. Alex Muller

C. GeoryBednorz

D. Charles Coulomb

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  1. What is the main advantage of temporary magnets?
  2. What is the SI unit of conductance?
  3. The electric field intensity between the parallel plate air capacitor is 20 N/C. If an insulating slab…
  4. The current of electric circuit is analogous to which quantity of a m
  5. What is used as the insulating material or dielectric in an electric ion
  6. Small voltages generated by a conductor with current in an external magnetic field.
  7. A law that states that the polarity of the induced voltage will oppose the change in magnetic flux causing…
  8. Hipernik is an alloy containing __________ iron and __________ nickel.
  9. The reluctance of a magnetic circuit is not dependent on which of the following?
  10. A permanent magnet does not exert a force on
  11. Germanium atom has ______ protons and ______ electrons.
  12. Which of the following materials has the highest dielectric strength?
  13. The flux density in an air-cored coil is 10^-3 Wb/m^2. With a cast iron core of relative permeability…
  14. A law establishing the fact that the algebraic su of the rises and drops of the mmf around a closed…
  15. A group of magnetically aligned atoms is called
  16. The reluctance of a magnetic circuit varies with
  17. Used to maintain strength of magnetic field
  18. What is the SI unit of conductivity?
  19. __________ is a substance of whose molecules consist of the same kind of atom.
  20. The temperature coefficient of resistance of conductors is
  21. The permeability of a material having a flux density of 5 Wb/m^2 is 10^-5 H/m. What is the value of…
  22. If a 20 V potential is applied across a relay coil with 50 turns having 1 ? of resistancea the total…
  23. Electric field intensity is a ________.
  24. The direction of force o a current carrying conductor placed in a m found by
  25. A magnetic field is
  26. Referred to as the specific reluctance of a material
  27. A principle that states that only two electrons with different spins are allowed to exist in a given…
  28. Electric potential is a _______ quantity.
  29. Lenz's law is the consequence of the law of conservation of
  30. ______ is an electromagnet with its core in the form of a close magnetic ring.