(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

[PLAIN]http://img535.imageshack.us/img535/8527/76966242.jpg [Broken]

sorry for the image, i made it very quickly

given this circuit find

1) the current (I) in the circuit

2) Vab of the battery that has potential 16V

3) Vac

1) how can i find the current with two batteries? if we had only the first one it would be

Vab = E - Ir1

but Vab = I(R1 + R2)

so we have

I(R1+R2) = E - Ir1 => I = E/(R1+R2+r1)

so i guess that would be the I with 1 battery, but with 2? :(

2) is this correct?

Vab = E - Ir1

we have I from (1) so we have the Vab

3) im not sure about this

Vac = E - IR1 - Ir2

please someone, guide me

thanks in advance

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# Homework Help: Circuits and electromotive force

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