Remarks:
1) /2; represents direction of current
2) I(x) represents current x
3) [] represents resistor and the number near them are their resistance
4) + and _ represents positive and negative pole of the batteries
respectively and the number near them are their voltage
in the first loop, the equation is 6-4 I(1)+3 I(2)-7=0 ________(1)
in the second loop , the equation is 7-3 I(2)-6 I(3)-4=0 ______(2)
Question:
assume the equations stated above are correct
1) why is the +3I(2) in first equation is positive , but it is -3I(2) in the second
equation, as the current I(2) is traversed in the same direction to the
resistor???????
similarily,
2) why the -7 in the first equation is nagative ,but it is +7 in the second equation, as
the current is traversed in the batteries from the negative to positive pole?????
thx!!!!!!!!!!!!!!!!!
更新1:
http://www.flickr.com/photos/asd45457/4334173584/
