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RESISTANCE

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					RESISTANCE
          RESISTANCE

 Ohm – Unit for resistance

 Circular Wires
 Circular mils
       1000 mils = 1 inch
                RESISTANCE

 Malleability- property of a metal to be
  deformed by compression without cracking
  or rupturing.

 Ductility- In a tensile test, ductile metals
  show considerable elongation eventually
  failing by necking, with consequent rapid
  increase in local stresses
               RESISTANCE

 Wire Table


 AWG


 Temperature Effect on Resistance


 Superconductors
              RESISTANCE
Types of resistors
    Fixed
    Variable
          Potentiometer
             Three legs
             Changes Voltage
          Rheostat
             Two legs
             Changes Current
                RESISTANCE

 Resistor Color Code
    0 – Black
    1 - Brown
    2 – Red
    3 – Orange
    4 - Yellow
    5 – Green
    6 – Blue
    7 – Violet
    8 – Gray
    9 – White
                   RESISTANCE

 Conductance – Ability of a material to allow current
  to flow

 Ohmmeters – Used to measure resistance

 Thermistors - A variable resistance thermistor that
  changes resistance as the engine's coolant
  temperature changes

 Varistors - A varistor is a type of resistor with a
  significantly non-ohmic current-voltage
  characteristic

				
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posted:8/23/2012
language:English
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