Two tiny spheres carrying charges `1.5 muC` and `2.5 muC` are located 30 cm apart. Find the potential
(a) at the mid-point of the line joining the two charges and
(b). At a point 10 cm from this mid-point in a plane normal to the line and passing through the mid-point.

Explanation

To solve the problem, we will break it down into two parts as specified in the question.

### Given Data:
- Charge \( Q_1 = 1.5 \, \mu C = 1.5 \times 10^{-6} \, C \)
- Charge \( Q_2 = 2.5 \, \mu C = 2.5 \times 10^{-6} \, C \)
- Distance between the charges \( d = 30 \, cm = 0.3 \, m \)

### Part (a): Finding the Potential at the Midpoint
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