- #1
jendrix
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Homework Statement
The circuit has an unknown component that is a resistor or a voltage source, find which one it is and it's value.
Homework Equations
V=IR, KVL, KCL
The Attempt at a Solution
I first used KVL on the outer loop:
14-2I1-10=0
I1=2A
Then on the inner left loop
14-4V-10I2=0
I2=1A
Then KCL to find current through 20ohm resistor of 1A
Inner loop on right hand side
10I2-1x20-?+0
? =-10V
Answer:
Due to the direction of the current the -10v couldn't be from a resistor as it would result in a positive 10v over the resistor.Instead it must be a -10v source.
Does this look correct? If this was a -10v source wouldn't that disprove all the currents I found?
Thanks
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