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Question:
In an electronic transition atom cannot emit

1.?-rays

2.infra red radiation

3.visible light

4.ultraviolet rays

Posted Date:-2021-08-27 05:17:15

More MCQS Questions and answers

  1. A completely filled band is called
  2. A ferromagnet will become fully magnetized at
  3. A vacant or partially filled band is called
  4. A wire is stretched by a force F which causes an extension 1. The energy stored in the wire is
  5. A wire obeys Hooks law is of length 11 when it is in equilibrium under a tension F1. Its length becomes 12 when the tension is increased to F2. The energy stored in the wire during this process is
  6. Any alteration produced in shapes length or volume when a body is subjected to some external force is called
  7. Bracket series is obtained when all transition of electron terminate on
  8. Coercive force is the force which opposes
  9. Energy needed to magnetize and demagnetize is represented by
  10. Excited atoms return to their ground state in
  11. Formation of large molecule by joining small molecules is
  12. Ground state energy of the 4th orbit in a H-atom is
  13. Holes can exist in
  14. Hydrogen atom does not emit X-rays because
  15. If the density of atoms remain same along any direction in a crystal is called
  16. In a semiconductors the charge carriers are
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  18. In hydrogen spectrum which one of the following series lies in the ultraviolet region?
  19. In obtaining an X-ray photograph of our hand we use the principle of
  20. In simple cube one atom or molecule lies at its
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  23. Materials that undergo plastic deformation before breaking are called
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  28. Reverse process of photoelectric effect is
  29. The angular position of cells remains the same for a sample of a crystal. This property is called
  30. The band theory of solids explains satisfactorily the nature of
  31. The breaking of crystals along definite direction is called
  32. The bulk properties of materials such as their mode of fracture can be related to their
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  37. The net charge on n-type material is
  38. The penetrating power of X-rays depends on their
  39. The radiations emitted form hydrogen filled discharge tube show
  40. The ration stress to strain in youngs modulus of the material then tension is
  41. Tick the correct statement
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  46. Which one has the greatest energy gap ?
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