Vernier calipers are shown with the jaws closed. What is the zero error?
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Zero error is defined as the condition where a measuring instrument records a reading when no reading is required. In case of Vernier calipers it occurs when a zero on the main scale does not coincide with a zero on Vernier scale it is called zero error for Vernier.
Explanation:
Zero error may arise due to knocks or other damage which causes the 0.00 mm marks to be misaligned when the jaws are perfectly closed or just touching each other.
When the two jaws of a vernier calipers are in touch zero?
When both jaws touch each other, zero mark of vernier scale is left to zero mark of main scale. Further 5th mark of vernier scale coincides with a certain mark of main scale.
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