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blue_tiger30
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Homework Statement
https://dl.dropbox.com/u/3405118/24-02-2013%2018-46-54.png
Find (a) the open-circuit voltage VL , and (b) the voltage across the 5 ohm load, by the following methods.
Method 1: Direct approach. First find the open circuit voltage by simple ‘potential divider’ approach
(but with complex impedances Z replacing the simple resistances we used under d.c. conditions). Then
find the equivalent series impedance of the two parallel branches on the right, and again use the ‘potential
divider’ idea to find VL. The calculations are lengthy, and you will probably find it best to use polar form
for the multiplications and divisions.Method 2: Thévenin. Find the Thévenin equivalent circuit for the transformer and 100 V supply. Then
apply the load and use the potential divider approach.
Method 3: Nodal Analysis. Call the node at the top of j35 node a and that at the top of the 5 load
node b, with the reference (zero) node at the bottom. Write down the nodal equations in terms of the
complex impedances, and solve for Vb.no drawings required
The Attempt at a Solution
I did method one and got the answer to be : Voc :98.63 e^-j3.38 , VL: 98.45 e^-j6.810
and tried to do the rest but I couldn't get the same answer can some one explain how do we the same answer for method 2 and 3
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