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Assertion (A) : If the potential differe...

Assertion (A) : If the potential difference applied to an electron is made `4` time , the de Broglie wavelength associated is halved
Reason (R ) : On making potential difference `4` times , velocity is doubled and hence `lambda` is halved

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Statement -I : If the potential difference applied to an electron is made 4 times, the de-Broglie wavelenght assoiated is halved. (Initial kinetic energy of the electron was zero ). Statement -II : On making potential difference 4 times velocity is doubled and hence according to De -broglie hypothesis lambda is halved.

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How much potential is to be applied to accelerate an electron, so that its de-broglie wavelength should 0.4 Å ?

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Knowledge Check

  • Statement -I : If the potential difference applied to an electron is made 4 times, the de-Broglie wavelenght assoiated is halved. (Initial kinetic energy of the electron was zero ). Statement -II : On making potential difference 4 times velocity is doubled and hence according to De -broglie hypothesis lambda is halved.

    A
    If both Statement -I & Statement -II are True & the Statement -II is a correct explanation of the Statement
    I.
    B
    If both Statement -I & Statement -II are True but the Statement -II is not a correct explanation of the
    Statement- I.
    C
    If Statement -I is True but the Statement -II is False.
    D
    If Statement -I is True but the Statement -II is True .

  • If the potential difference V applied to the coolidge tube is doubled, then the cut off wavelength

    A
    Is doubled
    B
    Is halved
    C
    Remains unchanged
    D
    Is quadrupled

  • The potential difference V required for accelerating an electron to have the de-Broglie wavelength of 1 Å is

    A
    100 V
    B
    125 V
    C
    150 V
    D
    200 V