Electrical Engineering - Circuit Theorems in AC Analysis - Discussion
Discussion Forum : Circuit Theorems in AC Analysis - General Questions (Q.No. 3)
3.
Referring to the given circuit, find ZTH if R is 15 k
and RL is 38 k.
and RL is 38 k.
89.82 
–51.3° k
–51.3° k19.2 –38.3° k
–38.3° k9.38–51.3° k
–51.3° k180 –38.3° k
–38.3° kDiscussion:
11 comments Page 2 of 2.
Yu Wei said:
3 years ago
In getting Zth all resistors must be considered.
1. However, XL is in parallel with 0 ohms (shorted part of the source), making it also zero so it will be disregarded.
4(0)/4+0 = 0
2. If not stated, automatically consider RL as your Vout, thus it's open.
3. This will leave us with Xc/R.
4. ZTH = 9.37 ∠ 51.3°.
1. However, XL is in parallel with 0 ohms (shorted part of the source), making it also zero so it will be disregarded.
4(0)/4+0 = 0
2. If not stated, automatically consider RL as your Vout, thus it's open.
3. This will leave us with Xc/R.
4. ZTH = 9.37 ∠ 51.3°.
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