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th3plan
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Homework Statement
What is the difference between an open circuit and a short circuit?
Open circuit has no current, so does that mean any resistor in series with it, has no current ,so it can be ignored for analysis( v=ir so 0 current means 0 V) for finding let's say the Thevenin equivalent.?
Now for Short circuit, do we ignore a resistor in series with the short, because current will take path of least resistance and ignore that resistor?
Also can short circuit have voltage through it ?
Now let's take a look at some problems i have right here, and i can't do...
http://i454.photobucket.com/albums/qq261/integralx2/2.jpg
Now let's say i want Thevenin equivalent at the 4H inductor, so i do the Isc(t<0 which makes it closed switch to charge the inductor), i would use mesh analysis and find the current through the 8 ohlm resistor, which will give me my Isc, this correct ?
NOw for the Voltage open circuit, I am confused on what to do , since Its open circuit , i ignore the 8 olhm resitor correct ?
Now another problem i have is this one ...:
http://i454.photobucket.com/albums/qq261/integralx2/1.jpg
Now if swithc is t<0 then the isc is just 40/5k which is .008A, now what is the Voltage open circuit, i don't understand how to calculate it, cause when i take Vth/Isc i don't get teh 2k olhms resistance i should have in the back of the book, what am i doign wrong ?
Any help would be great , thanks
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