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Femme_physics
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Homework Statement
http://img217.imageshack.us/img217/654/circuit05.jpg Internal Resistance = 10 ohms (each)
RL = 20 ohms
R2 = 30 ohms
R1 = 50 ohmsA) When the switch is open, calculate I
B) When the switch is closed, calculate I
Homework Equations
The Attempt at a Solution
First I'll try to answer A.
Whenever I'm told a voltage source has an internal resistance, I get confused.
Where is the internal resistance located in my calculations? Exactly where the volt source is? That's my assumption here.
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The current is 8 voltage, clockwise. (18 minus 10)
So now I just do
Rt = Ra1 + Ra2 + R1 + R2 = 100 ohms
I = 8/100
I = 0.08 [A]
Is that right?
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