RESISTOR

A resisto is a two-terminal electrical or electronic component that opposes an electric current by producing a voltage drop between its terminals in proportion to the current, that is, in accordance with Ohm's law: V = IR. The electrical resistance R is equal to the voltage drop V across the resistor divided by the current I through the resistor. Resistors are used as part of electrical networks and electronic circuits.

Contents

• 1 Identifying resistors
  • 1.1 Four-band axial resistors
  • 1.2 Preferred values
  • 1.3 5-band axial resistors
  • 1.4 SMT resistors
  • 1.5 Industrial type designation
• 2 Resistor standards
  • 2.1 Power dissipation

    

  • 2.2 Series and parallel circuits
• 3 Technology
  • 3.1 Carbon composition
  • 3.2 Carbon film
  • 3.3 Thick and thin film
  • 3.4 Metal film
  • 3.5 Wirewound
  • 3.6 Foil resistor
  • 3.7 Grid resistor
  • 3.8 Strain gauges
  • 3.9 Other types
• 4 Noise
• 5 Failure modes and pitfalls
• 6 See also
• 7 References
• 8 External links

From:wikipedia , free encyclopedia