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jeff1evesque
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I would attempt to solve these questions with "relevant equations", but my questions simply derive from an attempt of understanding class notes. If someone could attempt to help my understanding, that would be great. I've attached the PDF file that contains my corresponding questions.
Questions:
I. Pg. 2 (from the PDF file): Reading the first slide on this page, I understand the table containing various dot products. However, when I look at the second slide (on this page 2), I am slightly confused. Some of my questions include:
1. Why are each element in the matrix dotted products?
*** I know how to take dot products: multiply the first element of each vector together, multiply the second elements of each vector, and so on until the elements [for each unit direction] is exhausted, then sum them all. Or one could take the magnitude of each vector and multiply these to the angle difference between the two.***
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II. Pg. 7 (from the PDF file): My question come from the second slide of this page (pg. 7/22):
1. What applications are phasors used for? I've looked online, and found that phasors are sinusoidal functions where [tex]A, \omega, \theta[/tex] doesn't change with time (time-invariant). But I still don't know how this is useful.
2. What is the "instantaneous form"?
3. What is [tex]v_x[/tex] (which is also shown on the diagram on the top right)?
4. How does applying Kirchoffs Current law at the node containing [tex]v_x[/tex] provide the first equation (sum of two fractions = 0)?
***I know from physics, KCL tells us the amount of charge entering a particular system must equal the amount of energy exiting the system- So it is conservative.***
5. Can someone explain to me why -90degrees accounts for the phase shift between voltage and current in the capacitor?
Questions:
I. Pg. 2 (from the PDF file): Reading the first slide on this page, I understand the table containing various dot products. However, when I look at the second slide (on this page 2), I am slightly confused. Some of my questions include:
1. Why are each element in the matrix dotted products?
*** I know how to take dot products: multiply the first element of each vector together, multiply the second elements of each vector, and so on until the elements [for each unit direction] is exhausted, then sum them all. Or one could take the magnitude of each vector and multiply these to the angle difference between the two.***
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II. Pg. 7 (from the PDF file): My question come from the second slide of this page (pg. 7/22):
1. What applications are phasors used for? I've looked online, and found that phasors are sinusoidal functions where [tex]A, \omega, \theta[/tex] doesn't change with time (time-invariant). But I still don't know how this is useful.
2. What is the "instantaneous form"?
3. What is [tex]v_x[/tex] (which is also shown on the diagram on the top right)?
4. How does applying Kirchoffs Current law at the node containing [tex]v_x[/tex] provide the first equation (sum of two fractions = 0)?
***I know from physics, KCL tells us the amount of charge entering a particular system must equal the amount of energy exiting the system- So it is conservative.***
5. Can someone explain to me why -90degrees accounts for the phase shift between voltage and current in the capacitor?
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