Deep Dive: E7A08
The correct answer is A: It produces a 1 at its output if any input is 1. What logical operation does an OR gate perform is that it produces a 1 at its output if any input is 1. OR gate outputs 1 if any input is 1. For amateur radio operators, this is important for digital circuits. Understanding this helps when working with logic gates.
Why Other Answers Are Wrong
Option B: Incorrect. Producing 0 if all inputs are 1 isn't OR - OR produces 1 if any input is 1. Producing 0 isn't OR. Option C: Incorrect. Producing 0 if some but not all inputs are 1 isn't OR - OR produces 1 if any input is 1. Producing 0 isn't OR. Option D: Incorrect. Producing 1 if all inputs are 0 isn't OR - OR produces 1 if any input is 1. All inputs 0 isn't OR.
Exam Tip
OR gate operation = produces 1 if any input is 1. Think 'O'R = 'O'ne or more (1 if any input is 1). OR gate outputs 1 if any input is 1. Not produces 0, not some inputs, not all 0 - just 1 if any input is 1.
Memory Aid
OR gate operation = produces 1 if any input is 1. Think 'O'R = '1' if 'A'ny input. OR gate outputs 1 if any input is 1. Important for digital circuits.
Real-World Example
An OR gate: It produces a 1 at its output if any input is 1. If any input is high, the output is high. This is the operation - 1 if any input is 1.
Source & Coverage
Question Pool: 2024-2028 Question Pool
Subelement: E7A
Reference: 2024-2028 Question Pool · E7 - Practical Circuits
Key Concepts
Verified Content
Question from the official FCC Extra Class pool. Explanation reviewed by licensed amateur radio operators and mapped to the E7A topic.