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Home ‣ Digital Electronics ‣ Signals and Switches See What Others Are Saying!
  • Question

  • Determine if diodes D1 and D2 in the given figure are forward or reverse biased.

    Determine if diodes D1 and D2 in the given figure are forward or reverse biased. D1 forward and D2 r


  • Options
  • A. D1 forward and D2 reverse
  • B. D2 forward and D1 reverse
  • C. D1 and D2 reverse
  • D. D1 and D2 forward

  • Correct Answer
  • D1 forward and D2 reverse 

    • More questions

    • 1. With an OR gate, the output is HIGH only when both inputs are HIGH.

    • Options
    • A. True
    • B. False
      • Discuss
    • 2. Which format requires fewer conductors?

    • Options
    • A. Parallel
    • B. Serial
    • C. Both are the same
    • D. Cannot tell
      • Discuss
    • 3. ________ is the output frequency of the counter shown below.


    • Options
    • A. 4 MHz
    • B. 20 kHz
    • C. 210.5 kHz
    • D. 800 Hz
      • Discuss
    • 4. A good example of the use of a digital representation of an analog quantity is the audio recording of music.

    • Options
    • A. True
    • B. False
      • Discuss
    • 5. Which of the following RAM timing parameters determine its operating speed?

    • Options
    • A. tACC
    • B. tAA and tACS
    • C. tCO and tOD
    • D. tRC and tWC
      • Discuss
    • 6. Typically, how often is DRAM refreshed?

    • Options
    • A. 2 to 8 ms
    • B. 4 to 16 ms
    • C. 8 to 16 µs
    • D. 1 to 2 µs
      • Discuss
    • 7. The architecture of a PAL differs slightly from that of a PROM.

    • Options
    • A. True
    • B. False
      • Discuss
    • 8. CCD stands for ________.

    • Options
    • A. capacitor charging device
    • B. capacitor-capacitor drain
    • C. charged-capacitor device
    • D. charge-coupled device
      • Discuss
    • 9. Dynamic memories, such as the 2118 16K × 1 RAM, have to multiplex the address bus.

    • Options
    • A. True
    • B. False
      • Discuss
    • 10. The total amount of external code memory that can be interfaced to the 8051 is:

    • Options
    • A. 32K
    • B. 64K
    • C. 128K
    • D. 256K
      • Discuss

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