What do you understand by the term resistance? What is its S.I unit ?

Explanation

### Step-by-Step Solution:

1. **Definition of Resistance**:
- Resistance is defined as the property of a material that opposes the flow of electric current. It acts as a hindrance to the movement of electrons in a circuit.

2. **Dependence on Material**:
- The resistance of a material varies depending on its physical properties. Different materials have different resistances, which affects how easily electric current can flow through them.

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