Engineering How can I find Voltage V in an AC circuit using loop rules?

AI Thread Summary
To find Voltage V in an AC circuit using loop rules, it's essential to first solve for the currents. The discussion highlights the use of nodal analysis as an effective strategy, yielding a single-variable equation for V. However, confusion arose during the manipulation of coefficients, particularly when inverting values. The correct approach requires careful handling of complex numbers, as mistakes can lead to incorrect results. Overall, the conversation emphasizes the importance of precision in calculations and encourages collaboration for problem-solving.
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Homework Statement



Need to find Voltage V. I know that I need to first solve for the currents, have tried using loop rules, not having much luck.

Homework Equations



Just would like to know how to approach, and solve, this problem. ME and circuits has never been my friend, thanks!

The Attempt at a Solution


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You chose an excellent strategy using nodal analysis as it yields an equation in one variable that happens to be the one you want to find.

Something went wrong between your third and fourth step though, when you tried to invert the coefficient of V1 in moving it to the RHS of the equation.
 
WIN_20150301_175741.JPG

Dealing with i has been messing me up, don't use it much in Newtonian mechanics haha. I think I'm getting further away... according to chegg the solution is 28.28<45deg. ill attach my latest attempt. Thanks for the help!
 
Yeah, you've done the same thing again between the final line on the left and the new line at the top right. Note:

\left( \frac{1}{10} + \frac{j}{10} \right)^{-1} \neq \left( 10 - 10j \right)
 
Wow, embarrassing...

You sir are a scholar, and gentleman. Thanks!
 
Glad to help!
 

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