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- Question
The total impedance of a parallel RLC circuit:
Options- A. always increases as the applied frequency increases
- B. is equal to the sum of the values of resistance, inductive reactance and capacitive reactance
- C. always decreases as the applied frequency increases
- D. is maximum at the resonant frequency
- E. None of the above
- Correct Answer
- is maximum at the resonant frequency
- 1. Which one of the following phrases most accurately describes a purely inductive circuit?
Options- A. Resistances provide the only opposition to current flow
- B. Inductive reactance provides the only opposition to current flow
- C. Combinations of resistance and inductive reactance provide any opposition to current flow
- D. The ac voltage lags the current by 90 degree
- E. None of the above Discuss
- 2. Household light bulbs have a given power rating, and they operate at 120 V. Which one of the following equations most directly provides the current rating of these light bulbs?
Options- A. P = I2R
- B. P = IE
- C. P = E2/R
- D. I = P/E
- E. None of the above Discuss
- 3. Molecule is
Options- A. The smallest particle of a substance that retains the properties of that substance
- B. A atom that has a shortage of electrons in its outer orbit
- C. A atom that has an excessive number of electrons in its outer orbit
- D. A atom that flows whenever there is an imbalance of electrical charges between two points
- E. None of the above Discuss
- 4. The total inductance of a series inductor circuit is:
Options- A. equal to the sum of the individual inductance values
- B. equal to the sum of the individual inductive-reactance values
- C. less than the value of the smallest inductor
- D. equal to the source voltage divided by total current
- E. None of the above Discuss
- 5. Which one of the following statements best describes magnetic hysteresis?
Options- A. Hysteresis is the amount of magnetic flux that is not confined to the core material of an electromagnet
- B. Hysteresis is most apparent when a steady amount of current is lowing through the coil of an electromagnet
- C. Hysteresis is most apparent when the current through the coil of an electromagnet changes frequently
- D. Hysteresis is most apparent when the core material is saturated
- E. None of the above Discuss
- 6. A battery is a device composed of one or more:
Options- A. chemical cells
- B. voltage generators
- C. solar cells
- D. piezoeletric cells
- E. None of the above Discuss
- 7. Which one of the following devices is most often used for measuring opposition to current flow in a circuit?
Options- A. Ammeter
- B. Voltmeter
- C. Ohmmeter
- D. Wattmeter
- E. None of the above Discuss
- 8. A dielectric material is:
Options- A. a good conductor
- B. a good insulator
- C. a poor conductor of electrostatic fields
- D. a good conductor of magnetic fields
- E. None of the above Discuss
- 9. The rise time of a pulse waveform is the time required for the voltage to rise:
Options- A. from zero to its rms value
- B. from zero to its peak value
- C. from 10% of the peak value to 70.7% of the peak value
- D. from 10% of the peak value to 90% of the peak value
- E. None of the above Discuss
- 10. A device that converts mechanical into electrical energy is?
Options- A. solar cell
- B. thermocouple
- C. chemical cell
- D. generator
- E. None of the above Discuss
Electronic Principles problems
Search Results
Correct Answer: Inductive reactance provides the only opposition to current flow
Correct Answer: I = P/E
Correct Answer: The smallest particle of a substance that retains the properties of that substance
Correct Answer: equal to the sum of the individual inductance values
Correct Answer: Hysteresis is most apparent when the current through the coil of an electromagnet changes frequently
Correct Answer: chemical cells
Correct Answer: Ohmmeter
Correct Answer: a good insulator
Correct Answer: from 10% of the peak value to 90% of the peak value
Correct Answer: generator
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