Circuit Question

[ali2coolwitu]

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Hello. Please don't mind my crappy drawing, but what happens when the switch is closed? Obviousy this circuit is a parallel circuit before it is closed, but then what happens when the switch is closed? It becomes two parallel circuits? What equations do you use to determine current, change in resistances, etc? Looks like a wheatstone bridge set up once the switch closes...but not completely sure how to decipher this one!

 

[milski]

It becomes two pairs of resistors in parallel connected in series. Each parallel pair has a resistance of 1/(1/1+1/6)=6/7, the total resistance is 12/7. The voltage drop over each pair is the same and half of the total voltage, from there you can calculate the current through each resistor and the total current - V/2, V/12 and 7V/12.