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  • Question
  • 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

  • Correct Answer
  • an insulator 


  • Electronic Principles problems


    Search Results


    • 1. 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
    • 2. 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
    • 3. 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
    • Discuss
    • 4. 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
    • 5. Holes act like:

    • Options
    • A. Atoms
    • B. Crystals
    • C. Negative charges
    • D. Positive charges
    • E. None of the above
    • Discuss
    • 6. 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
    • 7. 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
    • 8. What kind of device is a diode?

    • Options
    • A. Bilateral
    • B. Linear
    • C. Nonlinear
    • D. Unipolar
    • E. None of the above
    • Discuss
    • 9. Who invented the first junction transistor?

    • Options
    • A. Smith
    • B. Gomes
    • C. Fisher
    • D. Shockley
    • E. None of the above
    • Discuss
    • 10. What is the total resistance of a series circuit that contains four resistors having values of 220W, 470W, 1W, and 1.2W?

    • Options
    • A. 692.2 Ohm
    • B. 844.5 Ohm
    • C. 3890 Ohm
    • D. 1234 Ohm
    • E. None of the above
    • Discuss


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