An introduction to NOT gates - Answers
Q1. A NOT gate has 1 input and 1 output.
Q2. There are 2 to the power 1 = 2 permutations of inputs.
Q3. 2 NOT gates have been used in this diagram.
Q4. Here is the truth table.
| A | B | C |
| 0 | 1 | 0 |
| 1 | 0 | 1 |
Q5. Study this diagram:
There are 2 inputs, A and B. There are 2 to the power 2 = 4 possible permutations of inputs.
Q6. Complete the truth table below.
| A | B | C | D |
| 0 | 0 | 0 | 1 |
| 0 | 1 | 0 | 1 |
| 1 | 0 | 0 | 1 |
| 1 | 1 | 1 | 0 |
Q7. This is a NAND gate. It is made up of an AND gate with a little circle on the right hand side.
Q8. Study this diagram:
There are 2 inputs, A and B. There are 2 to the power 2 = 4 possible permutations of inputs.
Q9. Complete the truth table below.
| A | B | C | D |
| 0 | 0 | 0 | 1 |
| 0 | 1 | 1 | 0 |
| 1 | 0 | 1 | 0 |
| 1 | 1 | 1 | 0 |
Q10. This is a NOR gate. It is made up of an OR gate with a little circle on the right hand side.
