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  • Question

  • What is the output voltage from the circuit in the given figure?

    What is the output voltage from the circuit in the given figure? +15 V +12 V +3 V 0 V


  • Options
  • A. +15 V
  • B. +12 V
  • C. +3 V
  • D. 0 V

  • Correct Answer
  • 0 V 

    • Signals and Switches problems

    Search Results

    • 1. The period of a waveform is the percentage of time the signal is HIGH.

    • Options
    • A. True
    • B. False
      • Discuss
    • 2. A diode placed in parallel across a relay coil serves what function?

    • Options
    • A. to regulate input voltage
    • B. to protect the coil from arcing
    • C. to ensure most of the current passes through the coil
    • D. to reduce arcing across the relay contacts
      • Discuss
    • 3. In a graphical representation of voltage versus time, ________ is displayed on the ________ axis and ________ is displayed on the ________ axis.

    • Options
    • A. time, y, voltage, x
    • B. voltage, y, time, x
      • Discuss
    • 4. TTL logic chips must have connections to Vcc and ground, even if all inputs and outputs are properly used and tied to valid signals.

    • Options
    • A. True
    • B. False
      • Discuss
    • 5. Which device(s) have almost ideal ON and OFF resistances?

    • Options
    • A. electromechanical relays
    • B. manual switches
    • C. semiconductor devices (diodes and transistors)
    • D. electromechanical relays and manual switches
      • Discuss
    • 6. Internally, a computer's binary data are almost always transmitted on parallel channels, commonly referred to as the:

    • Options
    • A. parallel bus
    • B. serial bus
    • C. data bus
    • D. memory bus
      • Discuss
    • 7. When an IC has two rows of parallel connecting pins, the device is referred to as a:

    • Options
    • A. QFP
    • B. DIP
    • C. TSSOP
    • D. CMOS
      • Discuss
    • 8. Normal operation of an NPN bipolar transistor requires the base to be ________ with respect to the emitter, and ________ with respect to the collector.

    • Options
    • A. positive, negative
    • B. positive, positive
    • C. negative, positive
    • D. negative, negative
      • Discuss
    • 9. What is the period of a clock waveform that has a frequency of 15.4 kHz?

    • Options
    • A. 649 µs
    • B. 6.49 µs
    • C. 64.9 µs
    • D. 0.649 µs
      • Discuss
    • 10. Determine the voltage on the collector Vc of the given transistor circuit.


    • Options
    • A. 0 V
    • B. +10 V
    • C. +4.7 V
    • D. +0.5 V
      • Discuss

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