Conductance and Conductivity differences physics скачать в хорошем качестве

Conductance and Conductivity differences physics

Difference between Conductance, Conductivity, resistance and resistivity 2𝑛𝑑 𝑦𝑒𝑎𝑟 𝑝ℎ𝑦𝑠𝑖𝑐𝑠 𝑐𝑢𝑟𝑟𝑒𝑛𝑡 𝑎𝑛𝑑 𝑒𝑙𝑒𝑐𝑡𝑟𝑖𝑐𝑖𝑡𝑦 Conductance Resistance is the opposition that a substance offers to the flow of electric current Conductance is the reciprocal of resistance of a conductor or the degree to which an object conducts electricity. 𝑠𝑦𝑚𝑏𝑜𝑙 𝑜𝑓 𝑐𝑜𝑛𝑑𝑢𝑐𝑡𝑎𝑛𝑐𝑒 𝑖𝑠= 𝑮=𝟏/𝑹 si unit of conductance mho is siemens denoted by 𝑆 According to ohms law V=𝐼𝑅⇒𝑉=𝐼/𝐺=𝐺=𝐼/𝑉 Resistance depending on dimension of the wire 𝐺∝𝐴 𝐺∝1/𝐿 𝐺∝𝐴/𝐿=𝜎 𝐿/𝐴 sigma 𝜎=𝑐𝑜𝑛𝑑𝑢𝑐𝑡𝑖𝑣𝑖𝑡𝑦 Conductivity Resistivity, is a fundamental property of a material that quantifies how strongly it resists or conducts the flow of electric current. Conductivity is the measure of the ease at which an electric charge can pass through a material. Reciprocal of resistivity is conductivity 𝜎=1/𝜌 𝐺∝𝐴/𝐿=𝜎 𝐴/𝐿 𝜎=𝐺 𝐿/𝐴 If 𝐴=1𝑚^2 𝑎𝑛𝑑 𝐿=1𝑚 𝜎=𝐺 Different materials have different values of conductivity #conductance #conductivity #resistance #resistivity #currentandelectricity #physicslearning #physicslectures #2ndyearphysics