Two charges A and B of `-5 muC` each are placed at a separation of 20 cm . Another charge C of +3 `muC` is placed at a separation of 20 cm from both the charges A and B . What should be the nature and magnitude of the charge to be placed at the midpoint between A and B so that net force on charge C is zero ?

Explanation

To solve the problem step-by-step, we need to analyze the forces acting on charge C due to charges A and B, and then determine the charge that must be placed at the midpoint between A and B to ensure that the net force on charge C is zero.

### Step 1: Identify the charges and their positions
- Charge A = -5 µC (located at point A)
- Charge B = -5 µC (located at point B, 20 cm from A)
- Charge C = +3 µC (located at point C, 20 cm from both A and B)
- Midpoint M between A and B is where we will place charge Q2.

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