Difference Between Evaporation and Condensation
|
Basics |
Resistance |
Resistivity |
|---|---|---|
| Definition |
The measure of the degree to which an object opposes the flow of electric current through it. |
The inherent property of a material determines how easily it can conduct electric current. |
| Symbol |
R |
ρ (rho) |
| Unit |
Ohms (Ω) |
Ohm-meters (Ω·m) |
| Formula |
R = V/I (where V is voltage and I is current) |
ρ = RA/L (where R is resistance, A is the cross-sectional area, and L is length) |
| Characterization |
Resistance is a macroscopic property and depends on the size, shape, and material of an object. |
Resistivity is a microscopic property and depends only on the material of an object. |
| Temperature dependence |
Resistance generally increases with an increase in temperature. |
Resistivity generally increases with an increase in temperature. |
| Importance |
Resistance is important in determining the behavior of electrical circuits and devices. |
Resistivity is important in designing electrical conductors and insulators. |
| Materials |
Resistance varies greatly among different materials. |
Resistivity is a specific property of each material. |
| Examples |
Examples of objects with resistance include wires, resistors, and light bulbs. |
Examples of materials with high resistivity include rubber, glass, and air. |
| Measurement |
Resistance can be measured using a multimeter. |
Resistivity is usually measured by performing experiments on a sample of the material. |
| Application |
Resistance is important in designing electronic circuits and devices. |
Resistivity is important in designing electrical conductors and insulators. |
Difference Between Resistance And Resistivity
Understanding how electricity travels through materials is crucial in electronics and physics. Resistance and resistivity are key terms often confused, yet they describe different aspects of electrical conduction. Resistance measures how much an object hinders electric current, while resistivity reflects the inherent ability of the material itself to resist current.
This article clarifies the differences between these two fundamental concepts, highlighting their importance and impact on electrical systems.