ABC is an equilateral triangle of side 10 cm. D is the mid point of BC charge 100 ` muC, -100 muC and 75 muC ` are placed at B, C and D respectively. What is the force experienced by a ` 1 mu C ` positive charge placed at A ?

Explanation

To solve the problem, we need to calculate the net force experienced by a 1 µC positive charge placed at point A due to the charges at points B, C, and D. Here are the steps involved:

### Step 1: Identify the Charges and Their Positions
- Charge at B (Q1) = 100 µC
- Charge at C (Q2) = -100 µC
- Charge at D (Q3) = 75 µC
- Charge at A (Q4) = 1 µC
- Side of the equilateral triangle (AB, AC, BC) = 10 cm = 0.1 m
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