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 halvedA. 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 .

Assertion (A) : If the potential difference applied to an electron is

1.	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 halvedA. 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)= 4 eV` `rArru_(1)=sqrt((2ev)/(m_(e)))` `lambda_(1)=(h)/("mu"_(1))" "=2mu_(1)` `lambda_(2)=(h)/("mu"_(2))=(h)/(2"mu"_(1))=(lambda_(1))/(2)`

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