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The main scale of vernier callipers reads in mm and its vernier scale is divided into 8 divisions which coincide with 5 divisions of the main scale. When the two jaws touch each other, the zero of the vernier coincides with the zero of main scale. When a rod is tightly placed along its length between the jaws, it is observed that the zero of vernier scale lies just left to 36^(th) division of main scale and fourth division ofvernier scale coincides with one main scale division. The measured value is (in cm) |
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Answer» 3.66 `X + 4V = nM` `X = nM - 4(5/8 M)` `X lt 1` MM for `n = 3` only So, `X=3-5/2=1/2mm` `:.` reading = `35+0.5 mm` ` = 3.55 cm`. |
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