Current-Voltage Graphs

• What is Ohm's Law?

  When voltage and current are directly proportional
• What would the current voltage graph for a resistor at constant temperature look like?

  Straight diagonal line (directly proportional)
• What does the current voltage graph for a filament lamp look like?

  Curve (as voltage increases current increases at a decreasing rate)
• What does the current voltage graph for a diode look like?

  Flat horizontal line and then sharp rise