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Circuit Theorems in AC Analysis - Engineering

Q1:

Determine VTH for the circuit external to RL in the given figure.

A 13563.4° V

B 13.563.4° V

C 13.50° V

D 1350° 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.