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1. Homework Statement
Two batteries and three resistors are connected as shown in the figure. How much current flows through the 9.0 V battery?
(a) When the switch is closed?
(b) When the switch is open?
2. Homework Equations
Kirchhoff's Loop Rule
I=V/R
3. The Attempt at a Solution
To find the current when the circuit is open, I totally disregarded the 5 ohm resistor and found the equivalent resistors of 2 and 4 and got 6. Then I used the equation I=9V/6 and that didn't work.
For the current when the circuit is closed, I applied Kirchhoff's Loop rule and found the current for each loop then solved by adding the two. That didn't work so I redrew the diagram and placed the 5 ohm resistor between the 2 and 4 ohm resistor and tried to figure out the current of that loop, but it also didn't work.
Additionally, does the 6 V battery in the drawing have anything to do with achieving the correct answer?
Thank you very much.
Two batteries and three resistors are connected as shown in the figure. How much current flows through the 9.0 V battery?
(a) When the switch is closed?
(b) When the switch is open?
2. Homework Equations
Kirchhoff's Loop Rule
I=V/R
3. The Attempt at a Solution
To find the current when the circuit is open, I totally disregarded the 5 ohm resistor and found the equivalent resistors of 2 and 4 and got 6. Then I used the equation I=9V/6 and that didn't work.
For the current when the circuit is closed, I applied Kirchhoff's Loop rule and found the current for each loop then solved by adding the two. That didn't work so I redrew the diagram and placed the 5 ohm resistor between the 2 and 4 ohm resistor and tried to figure out the current of that loop, but it also didn't work.
Additionally, does the 6 V battery in the drawing have anything to do with achieving the correct answer?
Thank you very much.
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