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  • Question
  • A step-down transformer has turns ration of 5:1. If the primary voltage is 120 Vrms, what is the secondary voltage?


  • Options
  • A. 12 V
  • B. 18 V
  • C. 24 V
  • D. 30 V
  • E. None of the above

  • Correct Answer
  • 24 V 


  • Electronic Principles problems


    Search Results


    • 1. Doubling the operating frequency of a capacitive circuit:

    • Options
    • A. doubles the amount of a capacitive reactance
    • B. has no effect on the capacitive reactance
    • C. cuts the capacitive reactance in half
    • D. multiplies the capacitive reactance by 6.28
    • E. None of the above
    • Discuss
    • 2. When operating below its resonant frequency, a parallel RLC circuit has the characteristics of a:

    • Options
    • A. parallel RL circuit
    • B. parallel RC circuit
    • C. parallel RLC circuit operated above its resonant frequency
    • D. purely resistive circuit
    • E. None of the above
    • Discuss
    • 3. When a series RLC circuit is operating at its resonant frequency:

    • Options
    • A. capacitive reactance is greater than the inductive reactance
    • B. inductive reactance is greater than the capacitive reactance
    • C. inductive reactance is equal to the capacitive reactance
    • D. the difference between inductive and capacitive reactance is equal to the resistance
    • E. None of the above
    • Discuss
    • 4. What is one important thing transistors do?

    • Options
    • A. Emit light
    • B. Amplify weak signals
    • C. Regulate voltage
    • D. Rectify line voltage
    • E. None of the above
    • Discuss
    • 5. A low-pass filter:

    • Options
    • A. passes lower-frequency signals and reduces higher-frequency signals
    • B. passes higher-frequency signals and reduces lower-frequency signals
    • C. has no effect on ac signals
    • D. reduces the level of all frequencies by a significant amount
    • E. None of the above
    • Discuss
    • 6. Which one of the following statements applies to common, non-rechargeable flashlight batteries?

    • Options
    • A. Common flashlight batteries are secondary wet-cell batteries
    • B. Common flashlight batteries are primary wet-cell batteries
    • C. Common flashlight batteries are primary dry-cell batteries
    • D. Common flashlight batteries are secondary dry-cell batteries
    • E. None of the above
    • Discuss
    • 7. Holes act like:

    • Options
    • A. Atoms
    • B. Crystals
    • C. Negative charges
    • D. Positive charges
    • E. None of the above
    • Discuss
    • 8. 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
    • 9. 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
    • 10. 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


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