What is the difference between a resistor and resistance ?

Explanation

### Step-by-Step Solution:

1. **Definition of Resistor**: A resistor is a physical component in an electrical circuit that is designed to resist the flow of electric current. It is an object that can be identified and measured, often marked with a specific resistance value in ohms (Ω).

2. **Definition of Resistance**: Resistance, on the other hand, is a property of the resistor. It quantifies how much the resistor opposes the flow of electric current. The unit of resistance is also ohms (Ω), and it indicates how much current will flow through the resistor when a certain voltage is applied across it.

3. **Functionality of Resistor**: The primary function of a resistor is to limit or control the flow of electric current in a circuit. When current passes through a resistor, it encounters resistance, which can cause a drop in voltage and limit the amount of current that can flow.

...