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Structure of Atom Test - 41

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Structure of Atom Test - 41
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  • Question 1
    4 / -1
    What is the wavelength of a car with a mass of 1.3 × 104 g moving at a speed of 1.0 × 103 cm/sec?
    (Planck’s constant 6.63 × 10−27 erg sec.)
    Solution

  • Question 2
    4 / -1
    The uncertainty in the position of an electron (mass = 9.1 × 10−28 g) moving with a velocity of 3.0 × 104 cms−1 accurate upto 0.011% will be
    Solution

  • Question 3
    4 / -1
    A proton is about 1840 times heavier than an electron. When it is accelerated by a potential difference of 1 kV, its kinetic energy will be
  • Question 4
    4 / -1
    Potential energy of Li2+ electron is
    Solution

  • Question 5
    4 / -1
    If λ0 is the threshold wavelength for photoelectric emission, λ the wavelength of light falling on the surface of a metal and m the mass of the electron, then the velocity of ejected electron is given by
    Solution

  • Question 6
    4 / -1
    When electron transition occurs from higher energy state to a lower energy state with energy difference equal to ∆E electron volts, the wavelength of line emitted is approximately equal to
    Solution

  • Question 7
    4 / -1
    A certain metal when irradiated by light (v = 3.2 × 1016Hz) emits photoelectrons with twice kinetic energy as did photo electrons when the same metal is irradiated by light (v = 2 × 1016Hz). The 0 v of metal is
    Solution

  • Question 8
    4 / -1
    The correct Schrodinger’s wave equation for an electron with E as total energy and V as potential energy is
  • Question 9
    4 / -1
    The units for equation are
    Solution

  • Question 10
    4 / -1
    The transition in He+ ion that would have the same wave number as the first Lyman line in hydrogen spectrum is
    Solution

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