A current of 1.0 A exists in a copper wore of cross-section `1.0mm^(2)`. Assuming one free electron per atom calculate the drift speed of the free electrons in the wire. The density of copper is `9000kg m^(-3)`.

Explanation

To solve the problem step by step, we will follow the outlined concepts and calculations.

### Step 1: Understand the relationship between current and drift velocity
The relationship between current (I), number of free electrons per unit volume (n), charge of an electron (E), cross-sectional area of the wire (A), and drift velocity (VD) is given by the formula:
\[ I = n \cdot E \cdot A \cdot V_D \]
From this, we can rearrange to find the drift velocity:
\[ V_D = \frac{I}{n \cdot E \cdot A} \]

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