I-V Characteristics

• Method for I-V Characteristics?

  1. Set up circuit with a voltage supply, ammeter, fixed and variable resistor
  2. Vary voltage across component by changing resistance of variable resistor, using a range of voltages, between 8-10 readings
  3. For each voltage, record value of current from ammeter 3 times and calculate average current
  4. Increase voltage further in steps of 0.5V, repeating steps 2/3
  5. Reverse terminals of power supply and take readings for the negative voltage/current

  6. Replace the fixed resistor with the filament lamp, then the diode, repeating the experiment for each
• Caution for I-V Characteristics?

  Wires and components may become hot after a current passes through. Allow to cool before handling.

  • Disconnect the power supply when not taking readings to prevent overheating.

  • Be aware that too high a voltage may damage components and cause excessive heating. Switch your circuit off if you think the voltage is too high.
• Diagram of I-V Characteristics?