In a series RC circuit, the capacitor voltage depends on its capacitive reactance. As frequency decreases, capacitive reactance increases, causing a greater portion of the supply voltage to appear across the capacitor. Therefore, to make the capacitor voltage greater than the resistor voltage, the frequency should be decreased.
The voltages in Problem 4 are measured at a certain frequency. To make the capacitor voltage greater than the resistor voltage, the ______ should be changed.
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