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The graph beneath shows the impedance Z as a function of frequency f for a series circuit of a resistor R, a coil L and a capacitor C. Use the sliders to control the values of R, L and C and use the select-boxes to change units. Start.
When the capacitor has a capacitance on C = 100 nF, what inductance L must the coil posess if the resonance frequency is to be 2 kHz? (Answer).
Determine the impedance Z at the frequency f = 70 Hz, when R = 310
W, C = 3100 nF and L = 810 mH. (Answer).Why do we say that the impedance is pure ohmic at the resonance frequency? (Answer).
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