Electronic principles
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Electronic principles questions with answers

195 multiple-choice questions. Open any question for its answer and explanation.

  1. How many types of flow are there in a semiconductor?
  2. Which one of the following devices is most often used for measuring opposition to current flow in a circuit?
  3. What form of energy is used to maintain an imbalance of charges between the terminals of a battery?
  4. Which one of the following statements best applies to a parallel RLC circuit?
  5. The equivalent of 1 micro A is
  6. Which one of the following statements best describes magnetic hysteresis?
  7. Which one of the following phrases best describes residual magnetism?
  8. 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?
  9. Which one of the following phrases most accurately describes a purely inductive circuit?
  10. The knee voltage of a diode is approximately equal to the
  11. A zener regulator has an input voltage from 15 to 20 V and a load current from 5 to 20 mA. If the zener voltage is 6.8 V, what value should the series resistor have? A. 310 Ohm B. 400 Ohm C. 410 Ohm D. 550 Ohm E. None of the above
  12. The rms value of a sine waveform is
  13. A high-pass filter
  14. Which one of the following statements is true for the voltages in a series RC circuit?
  15. A battery is a device composed of one or more
  16. Doubling the operating voltage of a purely capacitive circuit
  17. How much current flows through a 0.02-H choke that is operating from a 12-V ac, 100-Hz source?
  18. The transistor has a collector current of 10 mA and a base current of 40 mA. What is the current gain of the transistor? A. 250 µA B. 350 µA C. 0.25 µA D. 300 µA E. None of the above
  19. What is the phase shift between total current and voltage in the circuit of a 100 ohm resistor connected in parallel with a capacitor that has a reactance of 100 ohm
  20. Molecule is
  21. What form of energy is used for creating static electricity?
  22. Suppose the zener diode has a breakdown voltage of 10 V and zener resistance of 8.5 W, what is the additional voltage when the current is 20 mA?
  23. A transistor has a current gain of 125 and a base current of 30 µA. What is the collector current? A. 3.75 mA B. 3.2 mA C. 0.05 mA D. 13 mA E. None of the above
  24. A dielectric material is
  25. A certain electromagnet has 1000 turns of wire. How much current must flow through the coil in order to generate an mmf of 100 ampere-turns?