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Circuit Theorems in AC Analysis

Q1:
Referring to the given circuit, find ZTH for the part of the circuit that is external to RL.

A 12921.4° 

B 43.768.6° 

C 43.721.4° 

D 12.968.6° 

ANS:B - 43.768.6° 

Here, R1 and XL are in parallel. So, the Equivalent resistance is calculated based on the formula (R1*XL)/(R1+XL).

= (120*47j)/(120+47j) = 43.7 < 68.6 ohms.



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