Two point charges `-0.1muC and 0.2muC` are placed on diagonally opposite vertices of a square of side 15 cm. Locate a point P on the diagonal, where electric potential is zero. Consider the potential infinity to be zero.

Explanation

To solve the problem of locating point P on the diagonal of a square where the electric potential is zero, we can follow these steps:

### Step 1: Understand the Configuration
We have two point charges:
- \( Q_1 = -0.1 \, \mu C \) located at one vertex of the square.
- \( Q_2 = 0.2 \, \mu C \) located at the diagonally opposite vertex.

The side length of the square is \( 15 \, cm \).
...