A particle of mass m carrying charge `'+q_(1)'` is revolving around a fixed charge `'-q_(2)'` in a circular path of radius r. Calculate the period of revolution.

Explanation

`1/(4pi epsi_(0)) (q_(1)q_(2))/r^(2)=mr omega^(2)=(4pi^(2) mr)/T^(2)`,
`T^(2)=((4pi epsi_(0))r^(2) (4pi^(2) mr))/(q_(1)q_(2))` or `T=4pir sqrt((pi epsi_(0)mr)/(q_(1)q_(2)))`
and also we can say that
`(q_(1)q_(2))/(4pi epsi_(0) r^(2))=(mv^(2))/r" "implies" "V=sqrt((q_(1)q_(2))/(4pi epsi_(0) mr))`