The purpose of a resistor is to challenge the electric current running through it. This is called electrical resistance, and it is measured in ohm units. The resistance can be computed by using the ohms law, which is when the electrical current is known, and the voltage drop is calculated: The resistance of a resistor is dependant on its material and shape. The resistance is comparable to the voltage or pressure drop for a given current.
The resistance value of a standard axial resistor is typically marked on the resistor using a series of colored stripes. When analyzing a banded resistor, the resistance value has been ascertained from these marking bands. Once the resistance worth has been determined, the flow of current over that resistor voltage can be completed using Ohm's law.
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