alleryA strain gauge is a conductor whose resistance changes when what changes?
AIts colour
BIts length
CIts name
DIts owner
Answer & Solution
Correct answer: B. Its length
1. In a digital scale the load bends or deforms a part.
2. The strain gauge measures this because its electrical resistance changes when its length changes.
3. Colour has no effect on resistance here.
_Source: Wikipedia, Weighing scale, Domestic weighing scales_
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