Question 347Electricity & Electronics - Assistant Engineer

The correct answer is D) triangle. The schematic symbol for an operational amplifier in an analog circuit is a triangle. This triangle symbol is the standard representation used in electronic schematics and diagrams to denote an operational amplifier, which is a key component in many analog electronic circuits. The other options (trapezoid, circle, and square) are not the correct schematic symbols for an operational amplifier. These shapes are used to represent different electronic components, but not the operational amplifier.