What is Resistance?
Resistance is the property of a substance or component that opposes the flow of electric current through it is known as resistance. It is measured in ohms and is represented by the letter “R.” Resistance is induced by a variety of factors, including material type, temperature, and material dimensions. When an electric current passes through a material, it encounters resistance, which causes energy to be dissipated in the form of heat.
Resistance Formula:
Resistance (R) = Voltage (V) / Current (I)
Resistance is directly proportional to the length and temperature while it is inversely proportional to the cross-sectional area of the material. It is measured in ohms (Ω). The higher the resistance, the more difficult it is for current to flow through the material. Resistance is calculated using Ohm’s Law.
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.