The resistance of a conductor does NOT depend on which of the following factors ?
A) Length
B) Area of cross section
C) Pressure
D) Material

Options

A. Length
B. Area of cross section
C. Pressure
D. Material

Answer

To determine which factor the resistance of a conductor does NOT depend on, we can analyze each option based on the principles of electrical resistance.

### Step-by-Step Solution:

1. **Understanding Resistance**:
- Resistance (R) is defined as the obstruction to the flow of electric current in a conductor. It is influenced by several factors.

2. **Analyzing the Options**:
- **Option A: Length of the Conductor**:
- Resistance is directly proportional to the length of the conductor (R ∝ L). Therefore, if the length increases, the resistance increases.
- **Option B: Area of Cross Section**:
- Resistance is inversely proportional to the area of cross-section (R ∝ 1/A). This means that if the area increases, the resistance decreases.
- **Option C: Pressure**:
- Pressure does not have a direct relationship with the resistance of a conductor. It does not affect the flow of electric charge in the same way that length and area do.
- **Option D: Material**:
- The resistance also depends on the material of the conductor (R ∝ ρ, where ρ is the resistivity of the material). Different materials have different resistivities.

3. **Conclusion**:
- Based on the analysis, we can conclude that resistance does NOT depend on **Pressure** (Option C).

### Final Answer:
The resistance of a conductor does NOT depend on **C) Pressure**.