Logic Gates
ICSE · Class 12 · Physics
Flashcards for Logic Gates — ICSE Class 12 Physics. Quick Q&A cards covering key concepts, definitions, and formulas.
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State the definition of logic gates.
Answer
Logic gates are digital circuits which work according to some logical relationship between input and output signals.
What is the truth table of a logic gate?
Answer
A truth table is a table that shows all possible input combinations and the corresponding outputs for a logic gate.
State the Boolean expression for an OR gate.
Answer
OR gate: A+B=Y Meaning: Y is 1 if A or B or both are 1. Inputs: A, B = 0 or 1 Output: Y = 0 or 1…
State the Boolean expression for an AND gate.
Answer
AND gate: A·B=Y Meaning: Y is 1 only when both A and B are 1. Inputs: A, B = 0 or 1 Output: Y = 0 or 1…
State the Boolean expression for a NOT gate.
Answer
NOT gate: Ā=Y Meaning: Y is the negation of A. If A=0, then Y=1. If A=1, then Y=0.
A two-input OR gate has inputs A=0 and B=1. Find the output.
Answer
Given: A=0, B=1 Formula: A+B=Y Step 1: 0+1=1 Answer: Y=1 Verification: OR gate gives output 1 if either input is 1.
A two-input OR gate has inputs A=1 and B=1. Find the output.
Answer
Given: A=1, B=1 Formula: A+B=Y Step 1: 1+1=1 in OR logic Answer: Y=1 Verification: OR gate output is 1 when either or both inputs are 1.
A two-input AND gate has inputs A=0 and B=1. Find the output.
Answer
Given: A=0, B=1 Formula: A·B=Y Step 1: 0·1=0 Answer: Y=0 Verification: AND gate gives 1 only when both inputs are 1.
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