electrical resistance of a conductor

The electrical resistance of a conductor is a measure of how much it opposes the flow of electric current. It depends on several factors, including:

1. Material – Different materials have different resistivities (e.g., copper has low resistance, while rubber has high resistance).

2. Length – Longer conductors have higher resistance.

3. Cross-sectional area – Thicker conductors have lower resistance.

4. Temperature – Most conductors have higher resistance at higher temperatures.

Formula for Resistance

The resistance $R$ of a conductor is given by Ohm’s Law and the resistance equation:

$$R = \rho \frac{L}{A}$$

where:

• $R$ = resistance (ohms, Ω)

• $\rho$ = resistivity of the material (Ω·m)

• $L$ = length of the conductor (m)

• $A$ = cross-sectional area of the conductor (m²)

Would you like help calculating resistance for a specific conductor? 😊