Worksheet: NOT Gates

In this worksheet, we will practice determining the input and output of NOT gates in logic circuits and completing truth tables for NOT gates.

Q1:

The diagram shows three NOT gates connected as part of a logic circuit. If the input is 1, what is the output?

Q2:

The diagram shows a NOT gate. If the input is 0, what will the output be?

Q3:

Which of the following symbols represents a NOT gate?

  • A
  • B
  • C
  • D

Q4:

The diagram shows a NOT gate. If the output is 0, what must the input be?

Q5:

Input01
Output𝑝𝑞

The diagram shows three NOT gates connected as part of a logic circuit. The truth table shows the two different possible inputs.

What is the value of 𝑝 in the table?

  • A0
  • B1

What is the value of 𝑞 in the table?

  • A1
  • B0

Q6:

Four NOT gates are connected together in series. If the input of the first NOT gate is 0, what will the output of the final NOT gate be?

  • A0
  • B1

Q7:

Three NOT gates are connected together in series. If the input of the first NOT gate is 0, what will the output of the final NOT gate be?

  • A0
  • B1

Q8:

Four NOT gates are connected in series. How many different combinations of input values are there for these gates?

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