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 .

Statement -I : If the potential difference applied to an electron is m

1.	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 .
Answer» Correct Answer - A `lambda_(1)=sqrt((150)/(V))Å`, `lambda_(2)sqrt((150)/(4V))Å`=`(1)/(2)sqrt((150)/(V))Å`=`(lambda_(1))/(2)` `(1)/(2)m_(e)u_(1)^(2)=eV" "(1)/(2)m_(e)u_(2)^(2)=4eV` `rArru_(1)sqrt((2eV)/(m_(e)))" "rArru_(2)=2xxsqrt((2eV)/(m_(e)))` `lambda_(1)=(h)/("mu"_(1))" "2mu_(1)` `lambda_(2)=(h)/("mu"_(2))`=`(h)/("2mu"_(1))`=`lambda_(1)/(2)`

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