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The emission of electrons from hot bodies is called

A. Radiation effect

B. Edison effect

C. Skin effect

D. Half effect

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  1. The mass of proton is __________ the mass of an electron.
  2. A one cubic cm of copper has how many free electrons at room temperature?
  3. The current of electric circuit is analogous to which quantity of a m
  4. Two similar polesa each 1Wba placed 1 m apart in air will experience a repulsive force of
  5. When a conductor is stationary and the magnetic field is moving or changing the emf induced is called
  6. The branch of Engineering which deals with the magnetic effect of electric current is known as
  7. One farad equals
  8. Germanium atom has ______ protons and ______ electrons.
  9. A law establishing the fact that the algebraic su of the rises and drops of the mmf around a closed…
  10. The force acting on a unit n- pole placed at that point is called
  11. A good conductor has how many valence electrons?
  12. If a 20 V potential is applied across a relay coil with 50 turns having 1 ? of resistancea the total…
  13. A principle that states that only two electrons with different spins are allowed to exist in a given…
  14. The force between two charges placed a given distance apart ______ as the relative permittivity of the…
  15. What is the unit of reluctance?
  16. Gases whose particles are charged are known as
  17. If the number of valence electrons of an atom is less than 4a the substance is called
  18. Which of the following is a natural magnet?
  19. Electric potential is a _______ quantity.
  20. If the solenoid is gripped by the right hand with the fingers pointing the direction of current flowa…
  21. The amount of magnetizing force to counter balance the resid magnetic material is referred to as
  22. If the number of valence electrons of an atom is more than 4a the substance is called
  23. The magnetic flux through a wire loop in a magnetic field does not d
  24. A magnetic field is
  25. The magnetic field of a magnetized iron bar when strongly heated
  26. What bond is formed when one or more electrons in the outermost energy orbit of an atom are transferred…
  27. How many neutrons does a copper atom have?
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    A magnetic pole produces 5000 field lines. How much is the flux in webers? A. 50 10^-6
  29. When a wire loop is rotated in a magnetic field the direction of the induced emf changes one in every…
  30. If the length and area of cross-section of a wire are doubleda then its resistance