A resistor is a passive two-terminal electrical component that resists the flow of electric current. It is designed to create a specific amount of resistance in an electrical circuit, which is measured in ohms (Ω). Resistors are typically constructed as small, cylindrical components with color-coded bands indicating their resistance value and tolerance.

“Electronic resistors are indeed the unsung heroes of electrical engineering.”

  1. Carbon Composition Resistors: Made from a mixture of carbon and an insulating material, these resistors are cost-effective and widely used in general-purpose applications.
  2. Film Resistors: Constructed by depositing a resistive film on an insulating substrate, film resistors are available in metal film, carbon film, and thick-film varieties, offering high precision and stability.
  3. Variable Resistors: Also known as potentiometers or rheostats, these resistors have an adjustable resistance, making them suitable for volume controls and tuning circuits.
  4. Surface Mount Resistors (SMD): These miniature resistors are designed for automated assembly processes and are prevalent in modern electronics due to their compact size.
By Published On: September 9th, 2023

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