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- Question
An inductor and a resistor are in series with a sine wave voltage source. The frequency is set so that the inductive reactance is equal to the resistance. If the frequency is increased, then
Options- A. VR ? VL
- B. VL < VR
- C. VL = VR
- D. VL > VR
- Correct Answer
- VL > VR
- 1. In a Y-connected circuit, between each line voltage and the nearest phase voltage, there is a phase angle of
Options- A. 0°
- B. 30°
- C. 60°
- D. 120° Discuss
- 2. The quality factor (Q) is the ratio of true power to apparent power.
Options- A. True
- B. False Discuss
- 3. In an RC integrating circuit, the output voltage is taken across the capacitor.
Options- A. True
- B. False Discuss
- 4. A resistance of 3.3 MΩ is connected across a 500 V source. The resulting current is approximately
Options- A. 15.1 µA
- B. 151 µA
- C. 66 mA
- D. 660 mA Discuss
- 5. The number of megohms in 0.03 kilohms is
Options- A. 0.00002 MΩ
- B. 0.0002 MΩ
- C. 3 × 10?5 MΩ
- D. either 0.00002 MΩ or 0.0002 MΩ Discuss
- 6. The internal resistance of a 30,000 ohm/volt voltmeter set on its 50 V range is
Options- A. 15,000 Ω
- B. 150,000 Ω
- C. 1,500,000 Ω
- D. 15,000,000 Ω Discuss
- 7. An inductor, a 1 kΩ resistor, and a switch are connected in series across a 6 V battery. At the instant the switch is closed, the inductor voltage is
Options- A. 0 V
- B. 6 V
- C. 12 V
- D. 4 V Discuss
- 8. A 1.2 kΩ resistor is in series with a 15 mH coil across a 10 kHz ac source. The magnitude of the total impedance is
Options- A. 152.6 Ω
- B. 1,526 Ω
- C. 1,200 Ω
- D. 942 Ω Discuss
- 9. For 12 V and 40 mA, the power is
Options- A. 480 mW
- B. 0.480 W
- C. 480,000 µW
- D. all of the above Discuss
- 10. Determine VTH when R1 is 180 Ω and XL is 90 Ω.
Options- A. 135∠63.4° V
- B. 13.5∠63.4° V
- C. 12.2∠0° V
- D. 122∠0° V Discuss
More questions
Correct Answer: 30°
Correct Answer: False
Correct Answer: True
Correct Answer: 151 µA
Correct Answer: 3 × 10?5 MΩ
Correct Answer: 1,500,000 Ω
Correct Answer: 6 V
Correct Answer: 1,526 Ω
Correct Answer: all of the above
Correct Answer: 13.5∠63.4° V
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