Network Analysis: Backward Current?

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JasonL

Joined Jul 1, 2011
47
Hello everyone, I'm starting to learn network analysis on the e-book and I got to the branch current method section http://www.allaboutcircuits.com/vol_1/chpt_10/2.html.

I think I understand how to calculate for unknown values, but I can't wrap my head around about how there can be backwards current shown in the attachment. There is 1A flowing from the positive terminal of B1 to the positive terminal B2. I thought current flowed from the negative terminal to the positive terminal of a battery. So is it wrong that current always flows from negative to positive?
 

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crutschow

Joined Mar 14, 2008
24,942
Electron current flow is from battery negative to positive. Conventional current flow (assumes positive charges) is from battery positive to negative.

You can reverse the current direction into a battery if you apply a voltage greater than the battery voltage (which is how you charge a battery).
 
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