Electronic Principles problems
- 1. What is the phase shift between total current and voltage, if 100 ohm resistor connected in parallel with an inductor that has a reactance of 200W?
Options- A. 0 degree
- B. 26.6 degree
- C. 90 degree
- D. 180 degree
- E. None of the above Discuss
Correct Answer: 26.6 degree
- 2. The peak value of a sine waveform is:
Options- A. the amplitude at 70.7% of the maximum value
- B. the amplitude at 90% of the maximum value
- C. the amplitude at 1.41 times the maximum value
- D. the maximum positive or negative value
- E. None of the above Discuss
Correct Answer: the maximum positive or negative value
- 3. The basic unit of measurement for resistance is the:
Options- A. volt
- B. ampere
- C. ohm
- D. watt
- E. None of the above Discuss
Correct Answer: ohm
- 4. If N1/N2 = 2, and the primary voltage is 120 V, what is the secondary voltage?
Options- A. 0 V
- B. 36 V
- C. 40 V
- D. 60 V
- E. None of the above Discuss
Correct Answer: 60 V
- 5. Current is
Options- A. The flow of charged particles through a material
- B. An imbalance of electrical charges
- C. The force that causes electrons to flow
- D. The number of free electrons in an atom
- E. None of the above Discuss
Correct Answer: The flow of charged particles through a material
- 6. Which one of the following is most likely used for measuring the rate of electron flow?
Options- A. Voltmeter
- B. Ammeter
- C. Wattmeter
- D. Ohmmeter
- E. None of the above Discuss
Correct Answer: Ammeter
- 7. What is the difference between the kinds of charges for an electron and a proton?
Options- A. An electron has a positive charge and a proton has no charge
- B. An electron has a positive charge and a proton has a negative charge
- C. An electron has a negative charge and a proton has a positive charge
- D. An electron has a negative charge and a proton has no charge
- E. None of the above Discuss
Correct Answer: An electron has a negative charge and a proton has a positive charge
- 8. An ideal voltage source has
Options- A. Zero internal resistance
- B. Infinite internal resistance
- C. A load dependent voltage
- D. A load-dependent current
- E. None of the above Discuss
Correct Answer: Zero internal resistance
- 9. Which one of the following phrases most accurately describes a purely capacitive circuit?
Options- A. Resistances provide the only opposition to current flow
- B. Capacitive reactance provides the only opposition to current flow
- C. The ac voltage leads the current by 90 degree
- D. Combinations of resistance and capacitive reactance provide any opposition to current flow
- E. None of the above Discuss
Correct Answer: Capacitive reactance provides the only opposition to current flow
- 10. What is the inductive reactance of a 2-H coil operating at 60 Hz?
Options- A. 754 Ohm
- B. 30 Ohm
- C. 60 Ohm
- D. 120 Ohm
- E. None of the above Discuss
Correct Answer: 754 Ohm
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