A germanium atom has an atomic weight of72. How many neutrons are there?



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  1. A 6- V battery is connected across a solenoid of 100 turns having a resistance of 2 ?a Calculate the…
  2. A law that states that the current in a thermionic diode varies directly with the three- halves power…
  3. Which of the following has the least number of valence electrons?
  4. A magnetic field is
  5. Who discovered that a current-carrying conductor would move when placed in a magnetic field?
  6. Used to maintain strength of magnetic field
  7. Defined as the flux density produced in it due to its own induced magnetism
  8. If the magnetic material is located within a coil through which alternating current (60 Hz frequency)…
  9. What is the diameter of an atom?
  10. The force which set ups or tends to set up magnetic flux in a magnetic circuit
  11. Mmf in a magnetic circuit corresponds to _____ in an electric circuit
  12. Germanium atom has ______ protons and ______ electrons.
  13. The energy stored in an electrostatic field or electromagnetic field is called
  14. Hysteresis loss can be reduced by one of the following.
  15. Electric field intensity at a point due to a given charge ______ if the relative permittivity of the…
  16. The permittivity of a material is given by one of the following formulas.
  17. Electric field intensity at a point is numerically equal to ________ at that point.
  18. The ability of a material to conduct magnetic flux through it.
  19. At/m is a unit of
  20. The emf produced in a wire by its motion across a magnetic field does not depend upon the
  21. If a 20 V potential is applied across a relay coil with 50 turns having 1 ? of resistancea the total…
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    If the resistance of a material 2 m long and 2 m^2 in area of cross-section is 1.6 10^-8 ?a then its resistivity is
  23. The emf induced in a coil due to the change of its own flux linked with it is called
  24. The temperature coefficient of resistance of insulators is
  25. Which of the following is used by permanent magnets as the magnetic material?
  26. Bonding of atoms that is due to the force of attraction between positive ions and a group of negative…
  27. A factor used to correct for the electrostatic forces of the more distant ions in an ionic solid.
  28. A law relating between the magnetic and electric susceptibilities and the absolute temperatures which…
  29. What is the typical saturation flux density for most magnetic materials?
  30. An alloy of 22 percent iron and 78 per cent nickel.