<commit_before>---
layout: video
title:  "Resistor circuit with two batteries"
author: <NAME>
youtubeID: j-iR7puLj6M
comments: true
--- 

A learner wrote in with a question as she prepared for a final. It's looks like a complicated resistor circuit. But there's a trick! 

Created by <NAME>. (This is the very first video I made for Khan Academy.)

[Simulation model](http://spinningnumbers.org/circuit-sandbox/index.html?value=[["v",[120,64,3],{"name":"V1","value":"dc(11)","_json_":0},["0","4"]],["v",[120,128,3],{"name":"V2","value":"dc(11)","_json_":1},["0","3"]],["r",[248,64,5],{"name":"R1","r":"1.4","_json_":2},["2","4"]],["r",[200,128,3],{"name":"R2","r":"1.4","_json_":3},["3","2"]],["r",[200,184,3],{"name":"R3","r":"2.7","_json_":4},["1","2"]],["w",[248,64,248,128]],["w",[248,184,248,128]],["w",[120,64,120,128]],["w",[120,184,120,128]],["w",[168,128,200,128]],["w",[168,64,200,64]],["g",[120,184,0],{"_json_":11},["0"]],["a",[152,184,0],{"color":"magenta","offset":"0","_json_":12},["0","1"]],["w",[120,184,152,184]],["w",[200,184,168,184]],["view",18.159999999999997,30.792,2.44140625,"50","10","1G",null,"100","0.01","1000"]]) of the circuit. Click on **DC** to perform a DC analysis and find the current in question. <commit_msg>Replaced circuit model.<commit_after>---
layout: video
title:  "Resistor circuit with two batteries"
author: <NAME>
youtubeID: j-iR7puLj6M
comments: true
--- 

A learner wrote in with a question as she prepared for a physics class final. It's looks like a complicated resistor circuit. But there's a trick! 

Created by <NAME>. (This is the very first video I made for Khan Academy.)

[Simulation model](http://spinningnumbers.org/circuit-sandbox/index.html?value=[["v",[104,64,3],{"name":"","value":"dc(11)","_json_":0},["0","4"]],["v",[104,120,3],{"name":"","value":"dc(11)","_json_":1},["0","3"]],["r",[184,64,3],{"name":"","r":"1.4","_json_":2},["4","2"]],["r",[184,120,3],{"name":"","r":"1.4","_json_":3},["3","2"]],["r",[192,168,1],{"name":"","r":"2.7","_json_":4},["2","1"]],["w",[104,64,72,64]],["w",[72,64,72,120]],["w",[72,120,104,120]],["w",[72,120,72,168]],["w",[192,168,264,168]],["w",[264,168,264,120]],["w",[264,120,232,120]],["w",[264,120,264,64]],["w",[264,64,232,64]],["w",[152,64,184,64]],["w",[152,120,184,120]],["g",[72,168,0],{"_json_":16},["0"]],["a",[104,168,0],{"color":"magenta","offset":"0","_json_":17},["0","1"]],["w",[72,168,104,168]],["w",[144,168,120,168]],["view",2.1599999999999966,22.792,2.44140625,"50","10","1G",null,"100","0.01","1000"]]) of the circuit. Click on **DC** to perform a DC analysis to find the current. 
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