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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.

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resistance2
RESISTANCE
  • Ohm – Unit for resistance
  • Circular Wires
  • Circular mils
  • 1000 mils = 1 inch
resistance3
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
resistance4
RESISTANCE
  • Wire Table
  •  AWG
  • Temperature Effect on Resistance
  • Superconductors
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RESISTANCE

Types of resistors

  • Fixed
  • Variable
  • Potentiometer
                • Three legs
                • Changes Voltage
  • Rheostat
                • Two legs
                • Changes Current
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RESISTANCE
  • Resistor Color Code
  • 0 – Black
  • 1 - Brown
  • 2 – Red
  • 3 – Orange
  • 4 - Yellow
  • 5 – Green
  • 6 – Blue
  • 7 – Violet
  • 8 – Gray
  • 9 – White
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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