Special case for just two resistors in parallel

• When two resistors are in parallel, the equivalent resistance is the product of the two resistors divided by their sum.
• When the two resistors have the same value, the equivalent parallel resistance is exactly half of the original resistance.

Created by Willy McAllister.

Circuit sandbox: (copy and paste this whole link into a web browser)

http://spinningnumbers.org/circuit-sandbox/index.html?value=[[“v”,[112,72,0],{“value”:”dc(1)”,”json“:0},[“4”,”0”]],[“r”,[200,72,0],{“name”:””,”r”:”1k”,”json“:1},[“6”,”0”]],[“r”,[264,72,0],{“name”:””,”r”:”4k”,”json“:2},[“5”,”0”]],[“w”,[112,72,112,48]],[“w”,[200,48,264,48]],[“w”,[264,120,264,144]],[“w”,[264,144,200,144]],[“w”,[200,144,200,120]],[“w”,[200,144,112,144]],[“w”,[112,144,112,120]],[“g”,[200,144,0],{“json“:10},[“0”]],[“a”,[200,56,1],{“color”:”magenta”,”offset”:”0”,”json“:11},[“3”,”6”]],[“w”,[200,48,200,56]],[“a”,[264,56,1],{“color”:”magenta”,”offset”:”0”,”json“:13},[“3”,”5”]],[“w”,[264,48,264,56]],[“a”,[152,48,0],{“color”:”magenta”,”offset”:”0”,”json“:15},[“4”,”3”]],[“w”,[112,48,152,48]],[“w”,[200,48,168,48]],[“v”,[336,72,0],{“value”:”dc(1)”,”json“:18},[“2”,”0”]],[“r”,[416,72,0],{“name”:””,”r”:”800”,”json“:19},[“1”,”0”]],[“w”,[336,72,336,48]],[“w”,[416,48,416,72]],[“w”,[336,120,336,144]],[“w”,[416,144,416,120]],[“g”,[376,144,0],{“json“:24},[“0”]],[“w”,[336,144,376,144]],[“w”,[416,144,376,144]],[“a”,[368,48,0],{“color”:”magenta”,”offset”:”0”,”json“:27},[“2”,”1”]],[“w”,[336,48,368,48]],[“w”,[416,48,384,48]]]