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Dual Nature of ...

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  • Question 1
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    If α - particle and proton have same velocities, the ratio of de Broglie wavelength of α -particle and proton is ....

  • Question 2
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    If α - particle and proton are accelerated through the same potential difference, then the ratio of de Brogile wavelength of α - particle and proton is ........

  • Question 3
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    Read the paragraph carefully and select the proper choice from given multiple choices. According to Einstein when a photon of light of frequency f or wavelength λ is incident on a photo sensitive metal surface of work function Ø . Where Ø < hf (here h is Plank\'s constant) then the emission of photo-electrons place takes place. The maximum K.E. of emitted photo electrons is given by Kmax = hf – Ø . If the there hold frequency of metal is f0 then hf0 = Ø .
    A metal of work function 3.3 eV is illuminated by light of wave length 300 nm. The maximum K.E > of photo-electrons is  ........eV. (h = 6.6 × 10–34 J.sec)

  • Question 4
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    Read the paragraph carefully and select the proper choice from given multiple choices. According to Einstein when a photon of light of frequency f or wavelength λ is incident on a photo sensitive metal surface of work function Ø . Where Ø < hf (here h is Plank\'s constant) then the emission of photo-electrons place takes place. The maximum K.E. of emitted photo electrons is given by Kmax = hf – Ø . If the there hold frequency of metal is f0 then hf0 = Ø .
    The threshold frequency fo = ...........× 1014 Hz.

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  • Question 7
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  • Question 8
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  • Question 9
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  • Question 10
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    The value of stopping potential in the following diagram

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