Answer the following:
State Gauss' law in electrostatics. Derive an expression for the electric field due to an infinitely long straight uniformly charged wire.

Explanation

### Step-by-Step Solution

**Step 1: State Gauss's Law in Electrostatics**

Gauss's Law states that the total electric flux (Φ_E) through a closed surface is equal to the charge (Q) enclosed by that surface divided by the permittivity of free space (ε₀). Mathematically, it can be expressed as:

\[
\Phi_E = \oint \vec{E} \cdot d\vec{A} = \frac{Q}{\epsilon_0}
...