« · »

Physlets run in a Java-enabled browser, except Chrome, on the latest Windows & Mac operating systems. If Physlets do not run, click here for help updating Java & setting Java security.

Illustration 30.5: Ohm's "Law"

Please wait for the animation to completely load.

Ohm's law is not a "law" in the sense of "laws of physics" (for example, Newton's laws, conservation of energy, conservation of charge, etc.). Instead, it describes a linear relationship between current and voltage that holds true for some circuit elements, namely resistors. There are, however, other circuit elements that do not follow Ohm's law. Vary the voltage of the source and note the linear current-voltage relationship for the resistor. Compare this to the nonlinear response of a diode and a lightbulb (voltage is given in volts and current is given in amperes). Restart.

Illustration authored by Anne J. Cox.
Script authored by Wolfgang Christian and Anne J Cox.

The OSP Network:
Open Source Physics - Tracker - EJS Modeling
Physlet Physics
Physlet Quantum Physics