Plot I-V CurveΒΆ

Here we plot voltage across an element against the current flowing though it. The current is calculated from the voltage across a series resistance. The graph of resstors is a straiight line, but not for non-linear elemets like the diodes.

Objective

Plot the I-V curve of several circuit elements.

Procedure

_images/res-compare.svg
  • Connect the resistors as shown in the figure.
  • R2 is used for measuring current, generally 1000 Ohms
  • Current through the circuits is Voltage at A1 / R2
  • PV1 is varied is steps. Voltage across R1 with current is plotted
_images/plot-iv-screen.png