logo

CuriousTab

CuriousTab

Discussion


Home Digital Electronics Logic Gates Comments

  • Question
  • The output of a NOR gate is HIGH if ________.


  • Options
  • A. all inputs are HIGH
  • B. any input is HIGH
  • C. any input is LOW
  • D. all inputs are LOW

  • Correct Answer
  • all inputs are LOW 


  • Logic Gates problems


    Search Results


    • 1. If a 3-input OR gate has eight input possibilities, how many of those possibilities will result in a HIGH output?

    • Options
    • A. 1
    • B. 2
    • C. 7
    • D. 8
    • Discuss
    • 2. Fan-out is specified in terms of ________.

    • Options
    • A. voltage
    • B. current
    • C. wattage
    • D. unit loads
    • Discuss
    • 3. TTL operates from a ________.

    • Options
    • A. 9-volt supply
    • B. 3-volt supply
    • C. 12-volt supply
    • D. 5-volt supply
    • Discuss
    • 4. The output of a NOT gate is HIGH when ________.

    • Options
    • A. the input is LOW
    • B. the input is HIGH
    • C. power is applied to the gate's IC
    • D. power is removed from the gate's IC
    • Discuss
    • 5. How many input combinations would a truth table have for a six-input AND gate?

    • Options
    • A. 32
    • B. 48
    • C. 64
    • D. 128
    • Discuss
    • 6. The AND function can be used to ________ and the OR function can be used to ________ .

    • Options
    • A. enable, disable
    • B. disable, enable
    • C. enable or disable, enable or disable
    • D. detect, invert
    • Discuss
    • 7. What is the circuit number of the IC that contains four two-input AND gates in standard TTL?

    • Options
    • A. 7402
    • B. 7404
    • C. 7408
    • D. 7432
    • Discuss
    • 8. A logic probe is placed on the output of a gate and the display indicator is dim. A pulser is used on each of the input terminals, but the output indication does not change. What is wrong?

    • Options
    • A. The dim indication on the logic probe indicates that the supply voltage is probably low.
    • B. The output of the gate appears to be open.
    • C. The dim indication is the result of a bad ground connection on the logic probe.
    • D. The gate is a tristate device.
    • Discuss
    • 9. What is the Boolean expression for a three-input AND gate?

    • Options
    • A. X = A + B + C
    • B. X = A · B · C
    • C. A ? B ? C
    • D. A $ B $ C
    • Discuss
    • 10. Write the Boolean expression for an inverter logic gate with input C and output Y.

    • Options
    • A. Y = C
    • B. Y =
    • Discuss


    Comments

    There are no comments.

Enter a new Comment