Sähkönvastuksen
Sähkönvastus, often referred to as electrical resistance, is a fundamental property of materials that describes their opposition to the flow of electric current. It is the ratio of the voltage applied across a conductor to the current flowing through it, as described by Ohm's Law: R = V/I, where R is resistance, V is voltage, and I is current. The SI unit for electrical resistance is the ohm, symbolized by the Greek letter omega (Ω).
Materials vary significantly in their electrical resistance. Conductors, such as metals like copper and silver, have
Several factors influence a material's resistance. The material's inherent resistivity (ρ) is a key factor, representing how
Understanding and controlling electrical resistance is essential in countless electrical and electronic applications, from designing simple