Electronic Principles problems
- 1. The emitter diode is usually
Options- A. Forward-biased
- B. Reverse-biased
- C. Nonconducting
- D. Operating in the breakdwon region
- E. None of the above Discuss
Correct Answer: Forward-biased
- 2. Assuming 100% efficiency, what is the power being applied to the primary winding of the transformer described in the above question?
Options- A. 200 W
- B. 1000 W
- C. 20 W
- D. 100 W
- E. None of the above Discuss
Correct Answer: 200 W
- 3. The total capacitance of a series capacitor circuit is:
Options- A. equal to the sun of the individual capacitive-reactance values
- B. equal to the sum of the individual capacitance values
- C. equal to the source voltage divided by total current
- D. less than the value of the smallest capacitor
- E. None of the above Discuss
Correct Answer: less than the value of the smallest capacitor
- 4. What is the difference between a conductor and an insulator?
Options- A. A conductor allows current to flow much easier than an insulator does
- B. An insulator has an excessive number of free electrons, while a conductor has a few free electrons or none at all
- C. An insulator allows current to flow much easier than a conductor does
- D. The difference between conductors and insulators depends on how they are used
- E. None of the above Discuss
Correct Answer: A conductor allows current to flow much easier than an insulator does
- 5. To get the Thevenin voltage, you have to
Options- A. Short the load resistor
- B. Open the load resister
- C. Short the voltage source
- D. Open the voltage source
- E. None of the above Discuss
Correct Answer: Short the load resistor
- 6. Which one of the following phrasers best describes flux density?
Options- A. The concentration of lines of magnetic force
- B. The rate of change of the number of lines of magnetic force
- C. The opposition to a build-up of magnetic fields
- D. The force that maintains lines of force
- E. None of the above Discuss
Correct Answer: The concentration of lines of magnetic force
- 7. Assuming 100% efficiency, what is the power being consumed at the secondary winding of the transformer described in question 91?
Options- A. 200 W
- B. 1000 W
- C. 20 W
- D. 100 W
- E. None of the above Discuss
Correct Answer: 200 W
- 8. A zener diode has a voltage of 10 V and a current of 20 mA. What is the power dissipation?
Options- A. 200 mW
- B. 300 mW
- C. 20 mW
- D. 10 mW
- E. None of the above Discuss
Correct Answer: 200 mW
- 9. Which one of the following is a statement of KirchhofFs voltage law?
Options- A. The total voltage in a parallel circuit is less than the value of the smallest voltage
- B. The algebraic sum of voltages in a loop is equal to zero
- C. The voltage drop across a resistance is proportional to the value of resistance and the amount of current flowing through it
- D. The algebraic sum of voltages entering and leaving a point is equal to zero
- E. None of the above Discuss
Correct Answer: The algebraic sum of voltages in a loop is equal to zero
- 10. Which one of the following statements is true for the impedance of a series RC circuit?
Options- A. The impedance is greater than the sum of the resistance and capacitive reactance
- B. The impedance is equal to the sum of the resistance and capacitive reactance
- C. The impedance is greater than either the resistance or capacitive reactance but less than their sum
- D. The impedance is less than the sum of the resistance and capacitive reactance
- E. None of the above Discuss
Correct Answer: The impedance is greater than either the resistance or capacitive reactance but less than their sum
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