In the following diagram, which particle has highest e/m value ?

Options

A. A
B. B
C. C
D. D

Answer

D

Explanation

`evB=(mv^(2))/(r )`
`(e )/(m)prop (1)/(r )`, if B and v are the same. The radius of curvature of D is minimum. Therefore `(e )/(m)` is maximum.