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- Question
Which one of the following statements is true for the voltages in a series RL circuit?
Options- A. The total voltages is equal to the sum of the voltages across the resistance and inductance
- B. The voltage always has the same amplitude and phase for every part of the circuit
- C. The total voltage is less than the sum of the voltages across the resistance and inductance
- D. The total voltage lags the total current by less than 90
- E. None of the above
- Correct Answer
- The total voltage is less than the sum of the voltages across the resistance and inductance
- 1. If a transistor operates at the middle of the load line, an increase in the current gain will move the Q point
Options- A. down
- B. up
- C. nowhere
- D. off the load line
- E. None of the above Discuss
- 2. Suppose the peak value of a sinusoidal voltage is 50 V. What is the rms value?
Options- A. 37.4 V
- B. 35.4 V
- C. 38.74 V
- D. 30.4 V
- E. None of the above Discuss
- 3. Which one of the following statements is true?
Options- A. inductive reactance decreases with operating frequency
- B. inductive reactance is at a maximum for dc source voltages
- C. inductive reactance increases with operating frequency
- D. There is no meaningful relationship between inductive reactance and operating frequency
- E. None of the above Discuss
- 4. Which one of the following properties of a magnetic circuit can be directly compared to resistance in an electrical circuit?
Options- A. Reluctance
- B. Permeability
- C. Permeance
- D. Retentivity
- E. There is no valid comparison Discuss
- 5. What is the turns ratio of a power transformer that shows 50 V at its secondary winding when you apply 150 V to its primary winding?
Options- A. 1/4
- B. 1/3
- C. 2
- D. 3
- E. None of the above Discuss
- 6. Doubling the operating frequency of an inductive circuit:
Options- A. has no effect on the inductive reactance
- B. doubles the amount of inductive reactance
- C. multiplies the inductive reactance by 6.28
- D. cuts the inductive reactance in half
- E. None of the above Discuss
- 7. A circuit has two different voltage sources that are connected in a series-opposing form. If the sources are rated at 6 V and 9 V, what is the total source voltage?
Options- A. 3 V
- B. 16 V
- C. 7.5 V
- D. 8 V
- E. None of the above Discuss
- 8. If a load resistance is 1 kW, a stiff voltage source has a resistance of
Options- A. At least 10 Ohm
- B. less than 10 Ohm
- C. More than 100 k Ohm
- D. Less than 100 k Ohm
- E. None of the above Discuss
- 9. Positive ions are atoms that have
Options- A. Gained a proton
- B. Lost a proton
- C. Gained an electron
- D. Lost an electron
- E. None of the above Discuss
- 10. What is the inductive reactance of a 0.1-H coil that is operating at 1000 Hz?
Options- A. 100 Ohm
- B. Less than 1 Ohm
- C. 628 Ohm
- D. 444 Ohm
- E. None of the above Discuss
Electronic Principles problems
Search Results
Correct Answer: up
Correct Answer: 35.4 V
Correct Answer: inductive reactance increases with operating frequency
Correct Answer: Reluctance
Correct Answer: 3
Correct Answer: doubles the amount of inductive reactance
Correct Answer: 3 V
Correct Answer: less than 10 Ohm
Correct Answer: Lost an electron
Correct Answer: 628 Ohm
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