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Resistor

maker

A resistor is a passive electrical component that implements electrical resistance as a circuit element.

expanded

Resistors are used to control the flow of electric current in a circuit by providing resistance, measured in ohms (Ω). They are crucial in electronic circuits to ensure proper current levels for various components, protecting them from excessive current that could cause damage. Resistors are employed in numerous applications, from basic circuit prototypes to complex industrial electronics.

examples

A 1 kΩ ±5% carbon film resistor

Commonly used in breadboard prototypes to limit current flow to LEDs or microcontroller inputs during testing and development.

A 470 Ω ±1% metal oxide film resistor

Frequently utilized in power supply circuits for voltage division, allowing different voltage levels to be available without altering the rest of the design.

related terms

Resistance
The opposition to the flow of electric current, typically measured in ohms (Ω).
Thermistor
A thermistor is a type of resistor whose resistance varies significantly with temperature.
Series circuit
An electrical circuit configuration where components are connected end-to-end so the current flows through each component in a single path.
Inductor
An inductor is a passive electronic component that stores energy in a magnetic field when electrical current flows through it.
Impedance
Impedance is the measure of opposition that a circuit presents to a current when a voltage is applied.