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  • Question
  • 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

  • Correct Answer
  • the input is LOW 


  • Logic Gates problems


    Search Results


    • 1. 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
    • 2. What is the difference between a 7400 and a 7411 IC?

    • Options
    • A. 7400 has two four-input NAND gates; 7411 has three three-input AND gates
    • B. 7400 has four two-input NAND gates; 7411 has three three-input AND gates
    • C. 7400 has two four-input AND gates; 7411 has three three-input NAND gates
    • D. 7400 has four two-input AND gates; 7411 has three three-input NAND gates
    • Discuss
    • 3. The logic expression for a NOR gate is ________.

    • Options
    • A.
    • B.
    • C.
    • D.
    • Discuss
    • 4. A clock signal with a period of 1 µs is applied to the input of an enable gate. The output must contain six pulses. How long must the enable pulse be active?

    • Options
    • A. Enable must be active for 0 µs.
    • B. Enable must be active for 3 µs.
    • C. Enable must be active for 6 µs.
    • D. Enable must be active for 12 µs.
    • Discuss
    • 5. How many pins does the 4049 IC have?

    • Options
    • A. 14
    • B. 16
    • C. 18
    • D. 20
    • Discuss
    • 6. TTL operates from a ________.

    • Options
    • A. 9-volt supply
    • B. 3-volt supply
    • C. 12-volt supply
    • D. 5-volt supply
    • Discuss
    • 7. Fan-out is specified in terms of ________.

    • Options
    • A. voltage
    • B. current
    • C. wattage
    • D. unit loads
    • Discuss
    • 8. 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
    • 9. 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
    • Discuss
    • 10. 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


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