Quantum Physics Quiz for fun and Quiz Competition Practice 4

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#1. For electron scattering experiment, the de- Broglie wavelength of electrons used must be of the order of ___.

#2. If Ψ(r) = constant, then Schrödinger’s equation becomes __ .

#3. Which of the following has unit MeV ?

#4. Which of the following expressions refer to momentum?

#5. The study of which of the following is very essential prior to quantum mechanics?

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Explanation is given below

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  1. It must be 4 femtometer (10-15), which is, in fact, the diameter of the atom.
  2. ∇2Ψ(r) = 0 , if Ψ(r) = constant.
    So, the first term in the Schrödinger’s wave
    equation becomes zero. Hence, it becomes VΨ
    = EΨ.
  3. All the terms refer to energy which has the
    unit MeV (mega electron volt).
  4. Momentum, p = (2mE)1/2
  5. Hilbert space plays an important role in
    quantum mechanics. So, one needs to go
    through it before delving deep into quantum
    mechanics.

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Quantum Mechanics Quiz and answers

  1. For electron scattering experiment, the de-
    Broglie wavelength of electrons used must be of the order of ___.

a. 4 fm ()

b. 1 nm

c. 4 mm

d. 1 zm

  1. If Ψ(r) = constant, then Schrödinger’s
    equation becomes __ .
    a. EΨ = HΨ
    b. EΨ = VΨ ()
    c. VΨ = 0
    d. None of the above
  2. Which of the following has unit MeV ?
    a. m(c^2)
    b. pc
    c. hν
    d. all of the above ()
  3. Which of the following expressions refer to
    momentum?
    a. 2mE
    b. (2mE)^1/2 ()
    c. Ec
    d. hw
  4. The study of which of the following is very
    essential prior to quantum mechanics?
    a. Astrophysics
    b. Chemistry
    c. Hilbert Space ()
    d. All of the above

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