A particle of mass m carrying a charge `-q_(1)` starts moving around a fixed charge `+q_(2)` along a circulare path of radius r. Find the time period of revolution T of charge `-q_(1)`.

Explanation

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

### Step 1: Identify the forces acting on the particle
The particle with charge \( -q_1 \) experiences an electrostatic force due to the fixed charge \( +q_2 \). This force provides the necessary centripetal force for circular motion.

### Step 2: Write the expression for the electrostatic force
According to Coulomb's law, the magnitude of the electrostatic force \( F \) between the two charges is given by:
\[
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