Four point charges, +0.1 `mu`C,-0.1 `mu`C,-0.1 `mu`C and +0.1 `mu`C are kept at points A(0, 2 m), B(0, -2 m), C (-`sqrt2` m, `sqrt2` m) and D (`sqrt2` m, -`sqrt2` m) respectively. Calculate the resultant dipole moment of the combination.

Explanation

To calculate the resultant dipole moment of the combination of four point charges, we will follow these steps:

### Step 1: Identify the Charges and Their Positions
We have four point charges:
- Charge \( Q_1 = +0.1 \, \mu C \) at point \( A(0, 2 \, m) \)
- Charge \( Q_2 = -0.1 \, \mu C \) at point \( B(0, -2 \, m) \)
- Charge \( Q_3 = -0.1 \, \mu C \) at point \( C(-\sqrt{2} \, m, \sqrt{2} \, m) \)
- Charge \( Q_4 = +0.1 \, \mu C \) at point \( D(\sqrt{2} \, m, -\sqrt{2} \, m) \)
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