Question: Figure Q22.4 shows an AC voltage source connected to a resistor in series with an unknown circuit element hidden in a box. The box might

Figure Q22.4 shows an AC voltage source connected to a resistor in series with an unknown circuit element hidden in a box. The box might contain a single resistor, a single capacitor, or a single inductor.
(a) If the magnitude of the impedance as measured between points A and B increases as the frequency increases, what is in the box?
(b) If the magnitude of the impedance as measured between points A and B decreases as the frequency increases, what is in the box?
(c) If the magnitude of the impedance as measured between points A and B does not change as the frequency increases, what is in the box?

B Figure Q22.4

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