Resistors can also be used to provide a specific voltage for an active device such as a transistor.
What is resistor. Resistor is an electrical component that reduces the electric current. The resistor's ability to reduce the current is called resistance and is measured in units of ohms (symbol: ω). If we make an analogy to water flow through pipes, the resistor is a thin pipe that reduces the water flow. Resistors determine the flow of current in an electrical circuit. Where there is high resistance in a circuit the flow of current is small, where the resistance is low the flow of current is large. Resistance, voltage and current are connected in an electrical circuit by Ohm s Law. Resistors restrict or limit the flow of current in a circuit. The ability of a material or component to resist current flow is measured in ohms [ohm: Units of electrical resistance (R). 1 volt will force a current of 1 amp through a resistance of 1 ohm. Part of the Electronics glossary: A resistor is an electrical component that limits or regulates the flow of electrical current in an electronic circuit. Resistors can also be used to provide a specific voltage for an active device such as a transistor. All other factors being equal, in a direct-current (DC) circuit, the current through a resistor is inversely proportional to its resistance, and directly proportional to the voltage across it. A resistor is a passive two-terminal electrical component that implements electrical resistance as a circuit element.
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what is a resistor for