A charge Q is uniformly distributed over a rod of length `iota`. Condider a hypothetical cube of edge `iota` with the centre of the cube at one end of the rod. Find the minimum possible flux of the electric field through the entire surface of the cube.

Explanation

To solve the problem, we will follow these steps:

### Step 1: Understand the Configuration
We have a rod of length \( L \) with a total charge \( Q \) uniformly distributed along its length. We consider a cube of edge length \( L \) whose center is located at one end of the rod. This means that half of the cube (length \( L/2 \)) extends into the rod.

### Step 2: Determine the Charge Density
The linear charge density \( \lambda \) of the rod can be calculated as:
\[
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