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bolzano95
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Homework Statement
We bind two batteries with voltage 2V and 1.7V with inner resistance 0.2Ω and 0.1Ω in parallel series in such way that we bind each positive poles and negative poles together. What current runs trough the circle? What is the voltage between contact points of the batteries?
In the circle we include resistor R=2Ω.
What is the voltage between contact points of the batteries now?
What current flows through the circle?
Homework Equations
The Attempt at a Solution
First, I draw the electrical circle. Then I noticed that the wire is connecting + from first battery to + from first battery. I looked if the voltages of batteries are different and they are- therefore the current will flow from bigger to smaller electrical potential.
Question: From where does the current flows: From - pole of 1.7V to - pole of 2 or vice versa? Why? How does this work?
I solved this problem like this: What is the potential difference between the two batteries? 0.3V. I applied Ohm's Law and got the current.
In solution sheet it was written [tex]I= I_{1} -I_{2}[/tex]
For the voltage between the contact points of batteries I would instantly answer 0.3V, because that is the potential of which can current actually flow. But the correct answer is 1.7V. Is my thinking even correct?
[tex]U= U_{1} -IR_{1}=U_{2} +IR_{2}[/tex]
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