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Two electrons starting from rest are accelerated by equal potential difference.A. they will not have same kinetic energyB. they will have same linear momentumC. they will not have same de-Broglie wave lengthD. None of these correct |
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Answer» Correct Answer - D Kinetic energy of an electron is given by `k = (1)/(2) mv_(2) = eV` = same for both electron Where V = speed of electron V = potential difference Linear momentum of two electron may be different in direction but their magnitude i.e `mv = sqrt(2 mk)` will be same De-Broglie wavelength is given by `lamda = (h)/(mv)` = same for both electrons Minimum wavelength of produced x-rays is given by `lamda_(min) = (hc)/(eV)` = same for both electrons. |
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