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Aditya Vishwak
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So what actually is the cause of electrical Resistance?
In metals..
The primary cause of this resistance is the thermal motion of ions. This acts to scatter electrons (due to destructive interference of free electron waves on non-correlating potentials of ions).[citation needed] Also contributing to resistance in metals with impurities are the resulting imperfections in the lattice. In pure metals this source is negligible.
Aditya Vishwak said:A appreciable answer by Jeffery. But can anyone explain me the same briefly with non-quantum terminology, please?
Aditya Vishwak said:A appreciable answer by Jeffery. But can anyone explain me the same briefly with non-quantum terminology, please?
Electrical resistance is a measure of the opposition to the flow of electric current in a material. It is caused by collisions between the moving electrons and the atoms of the material.
The factors that affect electrical resistance include the type of material, its length and cross-sectional area, and its temperature. Materials with high resistance include insulators, while materials with low resistance include conductors.
Electrical resistance is measured in ohms (Ω) using a device called a multimeter. This device measures the voltage and current in a circuit and calculates the resistance using Ohm's law: R = V/I, where R is resistance, V is voltage, and I is current.
Resistance is a property of a specific object, while resistivity is a property of a material. Resistivity is a measure of how well a material resists the flow of electric current, while resistance depends on the geometry and dimensions of the object.
In most materials, as temperature increases, the resistance also increases. This is because at higher temperatures, the atoms in the material vibrate more, making it harder for electrons to pass through. However, in some materials, such as semiconductors, resistance decreases with increasing temperature.