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

To find the period of revolution \( T \) of a particle of mass \( m \) carrying charge \( +q_1 \) revolving around a fixed charge \( -q_2 \) in a circular path of radius \( r \), we can follow these steps:

### Step 1: Identify the forces acting on the particle
The particle experiences an electrostatic force due to the fixed charge \( -q_2 \). This electrostatic force provides the necessary centripetal force for the circular motion of the particle.

### Step 2: Write down the expression for electrostatic force
The electrostatic force \( F_c \) between the two charges can be expressed using Coulomb's law:
\[
...