Questions like this one are potentially on-topic on Electrical Engineering. However, that question is a little too basic for most of our users, and we don't get a lot of homework questions as it seems you do per this meta post on homework and "no question is too basic, but we won't do your homework". We do occasionally get questions which seem to be from people learning about electricity in physics classes, though.
Is that an example of a good, on-topic question on Physics? Where do you draw the line between questions like this (which is just a voltage divider attached to some voltage sources) and off-topic problems better suited for another site like Electrical Engineering?
Do you want us to refer questions like this to your site, or do you want to refer questions like this to us?
Also, a heads up: that question just got tweeted, so make sure it's nice and pretty according to your standards.