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Circuit Theorems in AC Analysis - Engineering

Q1:

Referring to the given circuit, what is VTH if VS = 120° V?

A 4.6938.7° V

B 9.3838.7° V

C 120° V

D 60° V

ANS:B - 9.3838.7° V

The problem states that Vsrc = 12. So you are correct @Adam.