Question

solve this no useless answer ​

Answer 1

Answer:

here is your answer dear

Answer 2

Acording to de Broglie postulate :--

lamda = h/p = h/sqrt(2me)

e = qv

lamda = h/sqrt(2mqv)

lamda = Beta 1/sqrt(v )

where

Beta = h/sqrt2mq is constant term

lamda inversely proportional to sqrt of mass and sqrt v if increase the value of lamda Decrease so v is also inversely proportional to mass

so option B is right