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- Question
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
- Correct Answer
- 3
- 1. How many protons does the nucleus of a silicon atom contain?
Options- A. 4
- B. 29
- C. 14
- D. 48
- E. None of the above Discuss
- 2. How many types of flow are there in a semiconductor?
Options- A. 0
- B. 1
- C. 2
- D. 4
- E. None of the above Discuss
- 3. How much current flows through a 0.02 micro F capacitor that is operating from a 12-V ac, 100-Hz source?
Options- A. 0.151 mA
- B. 157 raA
- C. 0.995 mA
- D. 2.02 A
- E. None of the above Discuss
- 4. Which one of the following is a statement of Kirchhoffs current law?
Options- A. The current through a resistance is proportional to the value of resistance and the IR drop across it
- B. The total current in a parallel circuit is less than the value of the smallest current
- C. The algebraic sum of currents in a loop is equal to zero
- D. The algebraic sum of currents entering and leaving a point is equal to zero
- E. None of the above Discuss
- 5. An audio transformer has a turn ratio of 9, What is its impedance ratio?
Options- A. 81
- B. 85
- C. 6
- D. 9
- E. None of the above Discuss
- 6. 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
- 7. 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
- 8. 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
- 9. 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
- 10. 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 Discuss
Electronic Principles problems
Search Results
Correct Answer: 14
Correct Answer: 2
Correct Answer: 0.151 mA
Correct Answer: The algebraic sum of currents in a loop is equal to zero
Correct Answer: 81
Correct Answer: Reluctance
Correct Answer: inductive reactance increases with operating frequency
Correct Answer: 35.4 V
Correct Answer: up
Correct Answer: The total voltage is less than the sum of the voltages across the resistance and inductance
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