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 and its speed also.

Explanation

`1/(4pi epsilon_(0))(q_(1)q_(2))/r^(2)=mromega^(2)=(4pi^(2)mr)/T^(2)`
`T^(2)=((4pi epsilon_(0))r^(2)(4pi^(2)mr))/(q_(1)q_(2))` or `T=4pi rsqrt((piepsilon_(0)mr)/(q_(1)q_(2)))`
where `vec(r)` is the vector drawn from source charge is test charge.