RC Circuits
A 120Ω resistor is in parallel with a capacitor with a capacitive reactance of 40 Ω. Both components are across a 12 V ac source. What is the magnitude of the total impedance?

3.7Ω
37.9Ω
14400Ω
4800Ω

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RC Circuits
Point +4 on the complex plane is

4 units above the origin on the j axis
4 units below the origin on the j axis
4 units right of the origin on the real axis
4 units left of the origin on the real axis

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