In a parallel LC circuit, if the input signal frequency is increased above resonant frequency then _______________?
Correct answer: A. XL increases and XC decreases
- A. XL increases and XC decreases
- B. XL decreases and XC increases
- C. Both XL and XC increase
- D. Both XL and XC decrease
Explanation
Inductive reactance is Xₗ = 2πfL, so it increases with frequency, while capacitive reactance Xc = 1/(2πfC) decreases. Thus, above resonance, Xₗ increases and Xc decreases.
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