Electronic Principles problems
- 1. At room temperature an intrinsic semiconductor has
Options- A. a few free electrons and holes
- B. many holes
- C. many free electrons
- D. No holes
- E. None of the above Discuss
Correct Answer: a few free electrons and holes
- 2. 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
Correct Answer: 81
- 3. 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
Correct Answer: The algebraic sum of currents in a loop is equal to zero
- 4. 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
Correct Answer: 0.151 mA
- 5. 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
Correct Answer: 2
- 6. 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
Correct Answer: 14
- 7. 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
Correct Answer: 3
- 8. 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
Correct Answer: Reluctance
- 9. 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
Correct Answer: inductive reactance increases with operating frequency
- 10. 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
Correct Answer: 35.4 V
More in Computer Science:
Programming
Copyright ©CuriousTab. All rights reserved.