Three resistors R1 = 3, R2 = 6, and R3 = 4 are connected as shown in the sketch to a battery that has neglible internal resistance. The current through R2 is 2.00 A. I already found the current for R1 (4A) and the current for R3 (6A) I can't figure out part C of my question, what is the battery voltage V?

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Microscopic view of current

In physics, the term current is expressed as the rate of flow of electric charges across the area per unit time (I=q/t). It propagates along in the direction of the motion of positive charges. When the current is caused by the motion of electrons, the direction of the current is opposite to the flow.