In Bainbridge's mass spectroscope the singly ionised ion of `N_(e)^(20)` strike the photographic plate at a distance of 20 cm from the slit. Then the distance at which singly ionised ions of `N_(e)^(22)` strike the photographic plate is :

Options

A. 10 cm
B. 11 cm
C. 20 cm
D. 22 cm

Answer

D

Explanation

Use `(r_(1))/(r_(2))=(m_(1))/(m_(2))*(q_(1))/(q_(2))`
`q_(1) and q_(2)` are same single ionised `N_(e)^(200) and N_(e)^(22)`
but `(m_(1))/(m_(2))=(20)/(22)`
`:.(r_(1))/(r_(2))=(20)/(22)` When `r_(1)=20 cm`
and `r_(2)= 22 cm`
`r_(2)=22 cm`