How Resistor Work - Unravel the Mysteries of How Resistors Work!
The Engineering Mindset・22 minutes read
Resistors are used in circuits to control electron flow, with different types like metal film or potentiometers offering various resistance values and functions. Additional resistors like wire wound or surface mount devices provide specific power and current ratings, while thermistors and light-dependent resistors change resistance based on temperature or light exposure.
Insights
- Resistors in circuits act as traffic jams for electrons, reducing current flow to protect components like LEDs, with various types such as metal film and wire wound offering specific designs and resistance values.
- Variable resistors like potentiometers and thermistors provide adjustable resistance based on factors like temperature or light exposure, while fusible resistors and baristas automatically adjust resistance to regulate voltage and current, showcasing diverse applications in circuit control and protection.
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Recent questions
What do resistors do in a circuit?
Resistors add resistance to a circuit, limiting the flow of electrons to protect components like LEDs. They are like a traffic jam, reducing current.
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Summary
00:00
Understanding Resistors in Electrical Engineering
- Resistors come in various shapes and sizes, represented by symbols in engineering drawings.
- Resistors are used to reduce the current of electrons in a circuit to protect components like LEDs.
- They add resistance to a circuit, making it harder for electrons to flow, measured in ohms.
- Resistors act like a traffic jam, limiting the flow of electrons and causing collisions.
- Different types of resistors include metal film, carbon film, and carbon composite, each with specific construction and materials.
- Resistors have fixed resistance values, but variable types like potentiometers and thermistors are also available.
- Metal film resistors have a helical groove to increase resistance, with colored stripes indicating resistance values.
- Wire wound resistors offer high power and current ratings, with different designs for heat dissipation.
- Surface mount device resistors are small and have a laser-cut groove to increase resistance, with numbers indicating resistance values.
- Potentiometers allow for adjustable resistance, with a dial to control the flow of electrons and output voltage.
17:28
Resistors: Types, Functions, and Applications
- A wire acts as a fuse, heating up until it snaps to cut the circuit; some versions use a metal alloy layer with a groove for power control.
- A fusible resistor with five bands is detailed, with the last band white indicating fusibility, and the other bands showing resistance values.
- Baristas are variable resistors that automatically adjust resistance based on voltage, acting as insulators until a certain voltage makes them conductive.
- Thermistors, like NTC and PTC types, change resistance with temperature, useful for inrush current limiting and temperature control.
- Resistance temperature detectors use platinum to measure temperature linearly, with resistance increasing as atoms become excited.
- Light dependent resistors adjust resistance based on light exposure, with cadmium sulfide coating allowing electrons to flow as light increases.
