# 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:

Input Output 0 1 𝑝 𝑞

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 in the table?

• A0
• B1

What is the value of 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?