Define the term "specific resistance and state its S.I. unit.

Explanation

### Step-by-Step Text Solution:

1. **Definition of Specific Resistance**:
- Specific resistance, also known as resistivity, is defined as the resistance offered by a unit length and unit cross-sectional area of a material to the flow of electric current when a voltage is applied across it.
- Mathematically, it can be expressed as:
\[ \rho = \frac{R \cdot A}{L} \]
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