# Worksheet: AND Gates

In this worksheet, we will practice determining the input and output of AND gates in logic circuits and completing truth tables for AND gates.

Q1:

Which of the following symbols represents an AND gate?

• A • B • C • D Q2:

The diagram shows two AND gates connected as part of a logic circuit. The truth table shows the output for the various combinations of the inputs.

Input AInput BInput COutput
0000
001
0100
110
1000
1010
110
111 What is the value of in the table?

What is the value of in the table?

What is the value of in the table?

What is the value of in the table?

Q3:

The diagram shows an AND gate. If input A is 1 and input B is 1, what will the output be? • A0
• B1

Q4:

The diagram shows an AND gate. If input A is 1 and the output is 0, what must input B be? Q5:

AND Gate
Input AInput BOutput
000
01
100
11

The truth table shows the output of an AND gate for various combinations of inputs.

What is the value of in the table?

What is the value of in the table?

Q6:

The diagram shows two AND gates, where the output of the first AND gate is one of the inputs to the second. If input is 1, input is 0, and input is 1, what is the output? Q7:

The diagram shows a logic circuit consisting of three AND gates. How many of the inputs must have a value of 0 in order for the output to have a value of 0? Q8:

The diagram shows a logic circuit consisting of three AND gates. How many of the inputs must have a value of 1 in order for the output to have a value of 1? Q9:

The diagram shows a logic circuit consisting of three AND gates. How many different possible combinations of input values are there for this circuit? Q10:

Each of the diagrams shows a logic circuit consisting only of AND gates. Which of the diagrams shows circuits where the output has a value of 1?

• A • B • C • D 