A point lilke paticle of mass `'m'` (very small) is projected in the vertically upward direction where already exists, a uniform horizontal electric field `barE`. The field strength is such that `qE=3/4mg`, where `q` is the charge on the particle. After what time the radius of curvature of the charged particle will be minimum.

Options

A. `(V_(0))/g`
B. `(8V_(0))/(25g)`
C. `(16V_(0))/(25g)`
D. `(25V_(0))/(16g)`

Answer

C

Explanation

When radius of curvature is minimum `barv` is `_|_` to `bara` & it is at `t=(16V_(0))/(25g)`