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  • Question
  • Suppose a voltage source has an ideal voltage of 15V and a source resistance of 0.2W. For what values of load resistance will the voltage source appear stiff?


  • Options
  • A. 20 Ohm
  • B. 30 Ohm
  • C. 10 Ohm
  • D. 100 Ohm
  • E. None of the above

  • Correct Answer
  • 20 Ohm 


  • Electronic Principles problems


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    • 1. What kind of battery is most likely included in a cordless electric knife?

    • Options
    • A. Zinc-carbon battery
    • B. Mercury-cell battery
    • C. Nicad battery
    • D. Lead-acid battery
    • E. None of the above
    • Discuss
    • 2. A device that converts light energy to electrical energy is called a:

    • Options
    • A. thermocouple
    • B. solar cell
    • C. photodiode
    • D. photo transistor
    • E. None of the above
    • Discuss
    • 3. Which one of the following equations most directly determines the power dissipation of a resistance when you know the power dissipation of a resistance when you know the voltage drop and current?

    • Options
    • A. P = IE
    • B. P = E2/R
    • C. P = I2R
    • D. I = P/E
    • E. None of the above
    • Discuss
    • 4. 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
    • 5. 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
    • 6. A loadstone is:

    • Options
    • A. a natural magnet
    • B. a temporary magnet
    • C. an artificial magnet
    • D. a paramagnetic alloy
    • E. None of the above
    • Discuss
    • 7. When operating above its resonant frequency, a series RLC circuit has the characteristics of a:

    • Options
    • A. series RL circuit
    • B. series RC circuit
    • C. series RLC circuit operated below its resonant frequency
    • D. purely resistive circuit
    • E. None of the above
    • Discuss
    • 8. What is the power dissipation of a resistance that has 24 V dropped across it and 0.25 A flowing through it?

    • Options
    • A. 3 W
    • B. 6 W
    • C. 64 W
    • D. 122 W
    • E. None of the above
    • Discuss
    • 9. What is a free electron?

    • Options
    • A. An electron that has been freed from its parent atom
    • B. An electron that costs nothing
    • C. An electron that has no electrical charge
    • D. An electron that has twice the amount of charge of a normal electron
    • E. None of the above
    • Discuss
    • 10. Which one of the following statements regarding ac circuits is correct?

    • Options
    • A. Current and voltages are in phase through a resistor
    • B. Current leads the voltage through a resistor
    • C. Current lags the voltage through a resistor
    • D. All of the above
    • E. None of the above
    • Discuss


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