1.

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 :

Answer»

10cm
11 cm
20 cm
22 cm

Solution :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`


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