describe the structure of a metal wire strain gauge
Strain gauge A typical strain gauge arranges a long, thin conductive strip in a zig-zag pattern of parallel lines. This does not increase the sensitivity, since the percentage change in resistance for a given strain for the entire zig-zag is the same as for any single trace. However, a single linear trace would have to be extremely thin and hence liable to overheating (which would both change its resistance and cause it to expand), or would have to be operated at a much lower voltage, making it harder to measure resistance changes accurately.
Utility clamp A Utility clamp is a laboratory apparatus resembling a pair of scissors. The screw in the middle works as the wide adjustment of 2-prong.[1] It composes of 3 parts: 2-prong adjust, metal rod, and clamp down (attach the clamp to the ring stand for adjust the height). This apparatus is connected to ring stand or retort stand. It is used to hold rounded laboratory glassware, for example, a beaker, flask, etc.[2] This clamp is made from stainless steel.[3]