<P> 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 . </P>
<P> 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 . </P>
describe the structure of a metal wire strain gauge
describe the structure of a metal wire strain gauge
arranges a long , thin conductive strip in a zig - zag pattern of parallel lines
arranges a long , thin conductive strip in a zig - zag pattern of parallel lines