A resistor is a passive two-terminal electrical component that implements electrical resistance as a circuit element. In electronic circuits,resistors are used to reduce current flow, adjust signal levels, to divide voltages, bias active elements, and terminate transmission lines, among other uses.
source/image: The Engineering Mindset
High-power resistors that can dissipate many watts of electrical power as heat may be used as part of motor controls, in power distribution systems, or as test loads for generators.In this video, we’re going to learn about how resistors work! We’ll explore the different types of resistors, how resistors work in circuits, and how to calculate resistance.
A resistor limits current and drops the voltage. Simple, but very useful. In the process of impeding the flow of current and reducing voltage, a resistor absorbs electrical energy, which it must dissipate as heat.
If R is the resistance in ohms, I is the current flowing through the resistor in amperes, and V is the voltage drop imposed by the resistor. Wirewound electrical resistors are alternatives to carbon composition and film type devices. They are constructed by winding a wire around an insulating core.