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Learn: Logic Gates
OCR GCSE J277 Computer Science specification
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Welcome!Today we'll learn about logic gates. Logic gates are essential in understanding how computers make decisions. Let’s explore them step by step!
What are Logic Gates?Logic gates are basic building blocks in digital circuits. They process inputs and produce outputs based on Boolean logic (true/false values represented as 1s and 0s). They are important because they help computers make decisions and perform calculations.
The AND GateThe AND gate outputs 1 only when both inputs are 1. If any input is 0, the output is 0. This is important for situations where all conditions must be met.
Quick check: What is the output of an AND gate when inputs are 1 and 0?
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The OR GateThe OR gate outputs 1 if either input is 1. It only outputs 0 when both inputs are 0. This is useful when at least one condition needs to be true.
An OR gate outputs 1 when {{blank0}} input is 1.
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The NOT GateThe NOT gate reverses the input. If the input is 1, the output is 0. If the input is 0, the output is 1. This is important for negating values in logic.
Quick check: What is the output of a NOT gate when the input is 0?
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Truth TablesA truth table shows all possible input combinations and their corresponding outputs for a logic gate. It’s a helpful tool for visualising how gates work.
Match the items on the left with their correct pairs on the right
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Review Time!Fantastic work! You’ve learned about AND, OR, and NOT gates, their behaviours, and truth tables. Let’s test your understanding with a few questions.
Which of the following statements are true about logic gates? (Select all that apply)
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The {{blank0}} gate outputs 1 only when both inputs are 1.
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Which gate reverses the input value?
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Match the items on the left with their correct pairs on the right
Start the lesson to answer this matching question
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