1. **Problem Statement:** Explain the OR gate with an example and a drawing. 2. **Definition:** An OR gate is a digital logic gate that outputs true or 1 when at least one of its inputs is true or 1. 3. **Formula:** The output $Q$ of an OR gate with inputs $A$ and $B$ is given by: $$Q = A + B$$ where $+$ denotes the logical OR operation. 4. **Truth Table:** | A | B | Q = A + B | |---|---|-----------| | 0 | 0 | 0 | | 0 | 1 | 1 | | 1 | 0 | 1 | | 1 | 1 | 1 | 5. **Example:** If input $A=0$ and input $B=1$, then output $Q = 0 + 1 = 1$. 6. **Explanation:** The OR gate checks if either input is 1. If yes, output is 1; otherwise, output is 0.