Two point charges `Q_1 = 400 muC `and `Q_2 = 100 muC` are kept fixed, 60 cm apart in vacuum. Find intensity of the electric field at midpoint of the line joining `Q_1` and `Q_2`.

Explanation

To find the intensity of the electric field at the midpoint of the line joining two point charges \( Q_1 \) and \( Q_2 \), we can follow these steps:

### Step 1: Convert the charges into Coulombs
Given:
- \( Q_1 = 400 \, \mu C = 400 \times 10^{-6} \, C \)
- \( Q_2 = 100 \, \mu C = 100 \times 10^{-6} \, C \)

### Step 2: Determine the distance between the charges
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