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- Question
Fan-out is specified in terms of ________.
Options- A. voltage
- B. current
- C. wattage
- D. unit loads
- Correct Answer
- unit loads
- 1. TTL operates from a ________.
Options- A. 9-volt supply
- B. 3-volt supply
- C. 12-volt supply
- D. 5-volt supply Discuss
- 2. 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
- 3. 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
- 4. 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
- 5. The logic expression for a NOR gate is ________.
Options- A.
- B.
- C.
- D.
Discuss
- 6. 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
- 7. 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
- 8. 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
- 9. 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
- 10. 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
Logic Gates problems
Search Results
Correct Answer: 5-volt supply
Correct Answer: the input is LOW
Correct Answer: 64
Correct Answer: 7400 has four two-input NAND gates; 7411 has three three-input AND gates
Correct Answer:
Correct Answer: 7
Correct Answer: all inputs are LOW
Correct Answer: enable or disable, enable or disable
Correct Answer: 7408
Correct Answer: The output of the gate appears to be open.
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