A positive 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:

Options

A. `V prop e^(r//r_0)`
B. `V prop ln(r/r_0)`
C. `V prop(r/r_0)`
D. `V propsqrt(ln(r/r_0))`

Answer

D

Explanation

`Eprop(1)/(r)," "Fprop(1)/(r)," "aprop(1)/(r)," "vdvprop(1)/(r)dr," "V^(2)prop1n((r)/(r_0))," "Vpropsqrt(1n((r)/(r_0)))`