Good day ,I need help in understanding a practice problem that my professor gave us.
A parallel resonant circuit has Q = 20 and is resonant at ωO = 10,000 rad/s. If Zin = 5kΩ at ω = ωO what is the width of the frequency band about resonance for which |Zin| ≥ 3kΩ?
I know that in a parallel RLC circuit , the quality factor Q is given by the equation Q=ω/BW and that the question seems to ask about the bandwidth . What I don't understand is the relevance of Zin and |Zin| in the question. I know that in resonance,the impedance is purely resistive but I can't understand what |Zin|≥ 3kΩ means.
Any help would be appreciated.