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- Question
The period of a waveform is:
Options- A. the time required to complete one full cycle
- B. the number of cycles completed in one second
- C. the time required for the voltage to rise from 10% to 90% of the peak amplitude
- D. equal to 0.707 times the peak amplitude
- E. None of the above
- Correct Answer
- the time required to complete one full cycle
- 1. Which one of the following statements most accurately reflects the nature of ac power?
Options- A. The current in an ac circuit flows in one direction, but changes value periodically
- B. The current in an ac circuit flows in one direction at a steady level
- C. The current in an ac circuit changes direction periodically
- D. The current in an ac circuit flows in two directions at the same time
- E. None of the above Discuss
- 2. Holes act like:
Options- A. Atoms
- B. Crystals
- C. Negative charges
- D. Positive charges
- E. None of the above Discuss
- 3. Which one of the following statements applies to common, non-rechargeable flashlight batteries?
Options- A. Common flashlight batteries are secondary wet-cell batteries
- B. Common flashlight batteries are primary wet-cell batteries
- C. Common flashlight batteries are primary dry-cell batteries
- D. Common flashlight batteries are secondary dry-cell batteries
- E. None of the above Discuss
- 4. A step-down transformer has turns ration of 5:1. If the primary voltage is 120 Vrms, what is the secondary voltage?
Options- A. 12 V
- B. 18 V
- C. 24 V
- D. 30 V
- E. None of the above Discuss
- 5. Doubling the operating frequency of a capacitive circuit:
Options- A. doubles the amount of a capacitive reactance
- B. has no effect on the capacitive reactance
- C. cuts the capacitive reactance in half
- D. multiplies the capacitive reactance by 6.28
- E. None of the above Discuss
- 6. The current gain of a transistor is defined as the ratio of the collector current to the
Options- A. base current
- B. emitter current
- C. supply current
- D. collector current
- E. None of the above Discuss
- 7. Which one of the following statements regarding ac circuits is correct?
Options- A. Current and voltage are in phase through an inductor
- B. Current leads the voltage through an inductor
- C. Current lags the voltage through an inductor
- D. All of the above
- E. None of the above Discuss
- 8. At room temperature an intrinsic silicon crystal acts approximately like
Options- A. a battery
- B. a conductor
- C. an insulator
- D. a piece of copper wire
- E. None of the above Discuss
- 9. Norton's theorem replaces a complicated circuit facing a load by an
Options- A. Ideal voltage source and parallel resistor
- B. Ideal current source and parallel resistor
- C. Ideal voltage source and series resistor
- D. Ideal current source and series resistor
- E. None of the above Discuss
- 10. Which one of the following statements is true?
Options- A. Current flows in a capacitor circuit only while ions are permitted to flow through the dielectric material
- B. Current flows in a capacitor circuit only while the charge on the plates is large enough to force the dielectric to conduct electrons
- C. Current can flow in a capacitor circuit, but not through the dielectric material itself
- D. Power returned to the circuit is always greater than the power absorbed
- E. None of the above Discuss
Electronic Principles problems
Search Results
Correct Answer: The current in an ac circuit changes direction periodically
Correct Answer: Positive charges
Correct Answer: Common flashlight batteries are primary dry-cell batteries
Correct Answer: 24 V
Correct Answer: cuts the capacitive reactance in half
Correct Answer: base current
Correct Answer: Current lags the voltage through an inductor
Correct Answer: an insulator
Correct Answer: Ideal current source and parallel resistor
Correct Answer: Current can flow in a capacitor circuit, but not through the dielectric material itself
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