Circuit Theorems in AC Analysis

Determine V_TH for the circuit external to R_L in the given figure.

A 135

63.4° V

B 13.5

63.4° V

C 13.5

0° V

D 135

0° V

ANS:B - 13.563.4° V

I=30<0/(90+45i) =.2981<-26.565 and then vth across resistance.

45i = 45<90*.2981<-26.565 = 13.4145<63.435.

So, the answer is B.

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