Find the work done by external force in bring two charges of + 10 C each from infinity to a separation of 2 meters.

Explanation

To find the work done by an external force in bringing two charges of +10 C each from infinity to a separation of 2 meters, we can follow these steps:

### Step 1: Understand the concept of work done in electrostatics
The work done by an external force in bringing two charges from infinity to a certain distance apart is equal to the change in potential energy of the system of charges.

### Step 2: Write the formula for potential energy
The potential energy (U) between two point charges is given by the formula:
\[ U = \frac{k \cdot q_1 \cdot q_2}{r} \]
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