A positive point charge is released from rest at a distance $r_0$ from a positive line charge with uniform density. The speed $(v)$ of the point charge, as a function of instantaneous distance $r$ from line charge, is proportional to
A positive point charge is released from rest at a distance $r_0$ from a positive line charge with uniform density. The speed $(v)$ of the point charge, as a function of instantaneous distance $r$ from line charge, is proportional to
- [JEE MAIN 2019]
- A
$v \propto {e^{ + r/{r_0}}}$
- B
$v \propto \ln \left( {\frac{r}{{{r_0}}}} \right)$
- C
$v \propto \sqrt {\ln \left( {\frac{r}{{{r_0}}}} \right)} $
- D
$v \propto \left( {\frac{r}{{{r_0}}}} \right)$
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