resistors

• Resistor


  A component that adds resistance to a circuit, causing a potential difference to be shared between the resistor and other components
• Resistor


  • Symbol is a zig-zag line
  • Used to make a component dimmer by adding resistance to the circuit
• Calculating resistance


  Resistance = Potential difference / Current
• Resistance is measured in ohms
• As resistance increases


  More energy is transferred as heat rather than to the component
• Ohmic conductor


  A resistor where the current is directly proportional to the potential difference, meaning the resistance is constant
• Resistance of an ohmic conductor only stays constant if the temperature is constant
• Increasing potential difference across a resistor

  Increases the current flowing through it in a linear fashion
• Resistors


  • Can have any resistance value needed