What is the amount of work done in moving a point charge around a circular arc of radius r at the centre of which another point charge is located?

Explanation

To solve the problem of calculating the work done in moving a point charge around a circular arc of radius \( r \) at the center of which another point charge is located, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding the Setup**:
- We have a point charge \( q \) located at the center of a circular arc of radius \( r \).
- We want to move another point charge \( Q \) along this circular arc.

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