1 Answer
The formula for resistivity (\( \rho \)) in class 10 is:
\[
R = \rho \times \frac{L}{A}
\]
Where:
In this formula:
\[
R = \rho \times \frac{L}{A}
\]
Where:
- \( R \) is the resistance of the material (in ohms, \( \Omega \))
- \( \rho \) is the resistivity of the material (in ohm-meters, \( \Omega \cdot m \))
- \( L \) is the length of the conductor (in meters, \( m \))
- \( A \) is the cross-sectional area of the conductor (in square meters, \( m^2 \))
In this formula:
- Resistivity (\( \rho \)) is a property of the material that measures how strongly it resists the flow of electric current. Different materials have different resistivities. For example, copper has a low resistivity, so it's a good conductor, while rubber has a high resistivity and is an insulator.