Geometric Visualization of Parallel Resistors

with Applet

The red lines,"R1" and "R2", represent the resistance of two resistors. The parallel circuit combination of these two resistors forms a combined resistance represented by the short red line, "R". R = (R1)(R2)/(R1 + R2) and is constructed by drawing the green lines and locating their mutual intersection. Note that R is independent of the separation distance between points B and E.

Notes:

If you mouse click and release anywhere on this Applet, then hit "return" a new frame will appear that can be expanded and moved around.
The code for this Applet is modified from the original work of David Joyce's Geometry Applet