# RC Circuits

• ## In a series RC circuit, 12 V(rms) is measured across the resistor and 15 V(rms) is measured across the capacitor. The rms source voltage is_____.

• A. 3 V
• B. 27 V
• C. 19.2 V
• D. 1.9 V
Explanation:

No answer description available for this question

• ## A 470 Ω resistor and a 0.2 µF capacitor are in parallel across a 2.5 kHz ac source. The admittance, Y, in rectangular form, is_____.

• A. 212 Ω
• B. 2.12 mS + j3.14 mS
• C. 3.14 mS + j2.12 mS
• D. 318.3 Ω
Explanation:

No answer description available for this question

• ## A 47 Ω resistor and a capacitor with a capacitive reactance of 120 Ω are in series across an ac source. What is the circuit impedance, Z?_____.

• A. 129 Ω
• B. 12.9 Ω
• C. 167 Ω
• D. 73 Ω
Explanation:

No answer description available for this question

• ## In a series RC circuit, when the frequency and the resistance are halved, the impedance_____.

• A. Doubles
• B. Is halved
• C. Is reduced to one-fourth
• D. Cannot be determined without values
Explanation:

No answer description available for this question

• ## A filter passes all frequencies.

• A. True
• B. False
Explanation:

No answer description available for this question

• ## In an RC circuit, the impedance is determined by both the resistance and the capacitive reactance combined.

• A. True
• B. False
Explanation:

No answer description available for this question

• ## In a parallel RC circuit, there is 100 mA through the resistive branch and 100 mA through the capacitive branch. The total rms current is_____.

• A. 200 mA
• B. 100 mA
• C. 282 mA
• D. 141 mA
Explanation:

No answer description available for this question

• ## The circuit phase angle is the angle between the total current and the applied (source) voltage.

• A. True
• B. False
Explanation:

No answer description available for this question

• ## An ac circuit consists of a resistor and a capacitor. To increase the phase angle above 45°, the following condition must exist:

• A. R = XC
• B. R > XC
• C. R < XC
• D. R = 5XC
Explanation:

No answer description available for this question

• A. True
• B. False