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- Question
Four 8 Ω speakers are connected in parallel to the output of an audio amplifier. If the maximum voltage to the speakers is 12 V, the amplifier must be able to deliver to the speakers
Options- A. 18 W
- B. 1.5 W
- C. 48 W
- D. 72 W
- Correct Answer
- 72 W
- 1. The capacitor voltage always leads the current by 90°.
Options- A. True
- B. False Discuss
- 2. If a 6 V and a 9 V source are connected series aiding, the total voltage is
Options- A. 6 V
- B. 9 V
- C. 3 V
- D. 15 V Discuss
- 3. Total current in an RC circuit always leads the source voltage.
Options- A. True
- B. False Discuss
- 4. In 40 kW, there are
Options- A. 0.4 mW
- B. 40,000 W
- C. 400 W
- D. 5,000 W Discuss
- 5. Energy is stored by a capacitor in a magnetic field.
Options- A. True
- B. False Discuss
- 6. A filter passes all frequencies.
Options- A. True
- B. False Discuss
- 7. A series circuit acts as a current divider.
Options- A. True
- B. False Discuss
- 8. A transformer responds only to dc.
Options- A. True
- B. False Discuss
- 9. A half-watt is equal to how many milliwatts?
Options- A. 5,000 mW
- B. 5 mW
- C. 500 mW
- D. 50 mW Discuss
- 10. To step 120 V ac up to 900 V ac, the turns ratio must be
Options- A. 75
- B. 750
- C. 7.5
- D. 0.13 Discuss
More questions
Correct Answer: False
Correct Answer: 15 V
Correct Answer: True
Correct Answer: 40,000 W
Correct Answer: False
Correct Answer: False
Correct Answer: False
Correct Answer: False
Correct Answer: 500 mW
Correct Answer: 7.5
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