Which element has four valence electrons?

A. Conductor

B. Insulator

C. Semiconductor

D. Semi- insulator

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  1. What is the other name for dielectric strength?
  2. The space outside the magnet where its pole have a force of attraction or repulsion on a magnetic pole…
  3. The force which set ups or tends to set up magnetic flux in a magnetic circuit
  4. Refers to the magnetic lines
  5. The branch of Engineering which deals with the magnetic effect of electric current is known as
  6. The electric potential across part AB of a circuit is 5 V; point A being at higher potential. If a charge…
  7. When the relative permeability of a material is slightly less than 1a it is called _____ material.
  8. Which of the following has the highest permeability?
  9. An electron- volt (eV) is a unit of
  10. The total number of magnetic lines of force in a magnetic field is called
  11. What is the SI unit of reluctance?
  12. The force of attraction or repulsion between two magnetic poles is directly proportional to their strengths.
  13. The straight line passing through the two poles of magnet is called
  14. The induced emf in a wire loop that is moved parallel to a uniform magnetic field is
  15. If a 20 V potential is applied across a relay coil with 50 turns having 1 ? of resistancea the total…
  16. A theorem which states that an electric current flowing in a circuit produces a magnetic field at external…
  17. The process by which an emf and hence current is generated or induced in a conductor when there is a…
  18. An alloy of 22 percent iron and 78 per cent nickel.
  19. Ohm's law cannot be applied to which material?
  20. What is the maximum number of electrons that can be accommodated in the last orbit of an atom?
  21. The magnetic flux of 2000 lines is how many Maxwells?
  22. A permanent magnet does not exert a force on
  23. When a current carrying conductor is placed in a magnetic fielda the maximum force will act on the conductor…
  24. What is the unit of magnetomotive force?
  25. Magnetic fields do not interact with
  26. Paramagnetic substance has a relative permeability of
  27. What is used as the dielectric material in high voltage transformers?
  28. The phenomenon by which a magnetic substance becomes a magnet when it is place near a magnet
  29. Which of the following is a paramagnetic material?
  30. Which of the following is used by temporary magnets as the magnetic material?