An ac voltage source is connected in series with a 1.5- ? F capacitor and a 630-

Question

An ac voltage source is connected in series with a 1.5-?F capacitor and a 630-? resistor. Using a digital ac voltmeter, the amplitude of the voltage source is measured to be 4.0?V rms, while the voltages across the resistor and across the capacitor are found to be 3.0?V rms and 2.7?Vrms, respectively.

Determine the frequency of the ac voltage source.

Express your answer to two significant figures and include the appropriate units.

Part B

Why is the voltage measured across the voltage source not equal to the sum of the voltages measured across the resistor and across the capacitor?

Why is the voltage measured across the voltage source not equal to the sum of the voltages measured across the resistor and across the capacitor?

-Because the voltages across the resistor and capacitor are in phase. - Because the voltages across the resistor and capacitor are not in phase. -Because the currents through the resistor and capacitor are not equal. - None of the above.

Explanation / Answer

Because the voltages across the resistor and capacitor are not in phase.

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