Example circuit that can be analyzed with <a href="https://en.wikipedia.org/wiki/Kirchhoff%27s_circuit_laws" class="extiw" title="w:Kirchhoff's circuit laws">Kirchhoff's circuit laws</a>. With presumed current directions and closed loops.
<a href="//commons.wikimedia.org/wiki/User_talk:MikeRun" title="User talk:MikeRun">MikeRun</a>
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<span class="int-own-work" lang="en">Own work</span>