Resistance
The The opposition in an electrical component to the movement of electrical charge through it. Resistance is measured in ohms. of an electrical Working parts of a product or system. is a measure of its opposition to current.
Resistor, variable reistor and ohmmeter symbols
A An electrical component that restricts the flow of electrical charge. Fixed-value resistors do not change their resistance, but with variable resistors it is possible to vary the resistance. opposes current by converting the electrical energy in a circuit into heat energy.
Variable resistors have many practical applications including volume controls, eg on a radio, and speed controls, eg on a mixer or a drill. There is usually a dial or sliding switch on the variable resistor which rotates or slides
