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  4. Find the thickness of the cubical object using the defective vernier calipers. The main scale has main marks and 10 divisions of vernier scale coincide with 9 divisions of main scale.

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Q. Find the thickness of the cubical object using the defective vernier calipers. The main scale has main marks and $10$ divisions of vernier scale coincide with $9$ divisions of main scale.Physics Question ImagePhysics Question Image

Physical World, Units and Measurements

Solution:

Zero error (excess reading) $= 0.3\, mm$ Observed thickness of block $=13.8 \,mm$ Actual thickness $= 13.8 - 0.3 = 13.5 \,mm$