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- Question
A capacitor and a resistor are connected in series to a sine wave generator. The frequency is set so that the capacitive reactance is equal to the resistance and, thus, an equal amount of voltage appears across each component. If the frequency is increased
Options- A. VR > VC
- B. VC > VR
- C. VR = VC
- D. VR and VC = 0
- Correct Answer
- VR > VC
- 1. The induced voltage across a coil with 250 turns that is located in a magnetic field that is changing at a rate of 8 Wb/s is
Options- A. 1,000 V
- B. 2,000 V
- C. 31.25 V
- D. 3,125 V Discuss
- 2. A 10 Ω resistor, a 90 mH coil, and a 0.015 µF capacitor are in series across an ac source. The impedance magnitude at 1,200 Hz below fr is
Options- A. 1,616 Ω
- B. 161 Ω
- C. 3,387 Ω
- D. 1,771 Ω Discuss
- 3. Approximately how much current flows through a 3.3 MΩ resistor across a 30 V source?
Options- A. 9 µA
- B. 90 µA
- C. 900 µA
- D. 9000 µA Discuss
- 4. In a certain transformer, the input power to the primary is 120 W. If 8.5 W are lost to the winding resistance, what is the output power to the load, neglecting any other issues?
Options- A. 0 W
- B. 14.1 W
- C. 111.5 W
- D. 1,020 W Discuss
- 5. A balanced load is one in which all the impedances are equal.
Options- A. True
- B. False Discuss
- 6. A 470 Ω resistor, a 220 Ω resistor, and a 100 Ω resistor are all in parallel. The total resistance is approximately
Options- A. 790 Ω
- B. 470 Ω
- C. 60 Ω
- D. 30 Ω Discuss
- 7. What kVA rating is required for a transformer that must handle a maximum load current of 8 A with a secondary voltage of 2 kV?
Options- A. 4 kVA
- B. 0.25 kVA
- C. 16 kVA
- D. 8 kVA Discuss
- 8. In a series RLC circuit, the current is minimum at resonance.
Options- A. True
- B. False Discuss
- 9. In a series circuit, the individual powers are additive.
Options- A. True
- B. False Discuss
- 10. If the voltage is stepped up, the current is stepped down, and vice versa.
Options- A. True
- B. False Discuss
More questions
Correct Answer: 2,000 V
Correct Answer: 1,616 Ω
Correct Answer: 9 µA
Correct Answer: 111.5 W
Correct Answer: True
Correct Answer: 60 Ω
Explanation:
1/R = (1/470 + 1/220 + 1/100)
R = 59.98 ohm
R = 59.98 ohm
Correct Answer: 16 kVA
Correct Answer: False
Correct Answer: True
Correct Answer: True
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