Electrical resistance is the measure of how much an electrical component or material opposes the flow of electric current. It is a property of materials and is measured in ohms (Ω).
When an electric current flows through a material, it encounters resistance in the form of collisions between the moving electrons and the atoms of the material. This causes a loss of energy, which is released in the form of heat. The resistance of a material depends on its physical properties, such as its length, cross-sectional area, and temperature.
The resistance of a material can be calculated using Ohm's law, which states that the resistance (R) is equal to the voltage (V) divided by the current (I), or R = V/I. Electrical resistance is an important concept in many areas of electrical engineering and is used to design and analyze electrical circuits and devices.
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