Problem (7) The circuit shown is a Wheatstone bridge that will allow you to determine the reactance of an inductor or a capacitor. The circuit is adjusted by changing R1 and R2 until Vab is zero. R1...

Extracted text: Problem (7) The circuit shown is a Wheatstone bridge that will allow you to determine the reactance of an inductor or a capacitor. The circuit is adjusted by changing R1 and R2 until Vab is zero. R1 L3 b vs(1) R2 a. Assuming that the circuit is balanced, that is, that Vab = 0, determine X4 in terms of the circuit elements. b. b. If C3 = 4.7 µ F, L3 = 0.098 H, R1 = 100 -,R2 = 1 -, vS (t) = 24 sin(2,000t), and vab = 0, what is the reactance of the unknown circuit element? Is it a capacitor or an inductor? What is its value? c. What frequency should be avoided by the source in this circuit, and why? ele