What is the circuit symbol for a strain gauge?
A strain gauge is a fine wire looped back and forth in a tight S-pattern, creating a very long conducting path in a small space. A strain gauge is a type of resistor, and a resistor is the correct circuit symbol.What It IsA strain gauge is a device that measures tiny changes in the length of the substrate to which it is mounted. Bending, stretching or compression of the substrate causes lengthening or shortening of the fine wires in the strain gauge.ResistanceResistance through a wire is directly related to the cross-sectional area of the wire. Think of this like water moving through a hose. If the hose is small in diameter, less water moves through at a time, while a larger diameter hose allows more water to move through.How a Strain Gauge WorksWhen a gauge is placed under tension, the length of the fine wire array is increased, the cross-sectional area of the wires is decreased and resistance is increased. When the gauge is under compression, the array length is decreased, the cross-
