RC Circuits

A 120 Ω 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?

  • A. 37.9 Ω
  • B. 3.7 Ω
  • C. 14,400 Ω
  • D. 4,800 Ω
Answer: Option A.
Explanation: 

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