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In a vernier callipers 10 VSD = 9 MSD and zero mark of vernier scale lies to the right of zero mark of main scale and to the left of first smallest division with 4th mark of vernier division coinciding with a mark on main scale division when jaws of the callipers are in contact with each other. Then zero error of the vernier callipers is (take 1 smallest division on main scale as 1mm)

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Detailed Solution

Here the zero error is positive error Least count of the vernier scale =1-910mm=0.1 mm∴ Zero error = 4 x 0.1 mm = + 0.4 mm

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In a vernier callipers 10 VSD = 9 MSD and zero mark of vernier scale lies to the right of zero mark of main scale and to the left of first smallest division with 4th mark of vernier division coinciding with a mark on main scale division when jaws of the callipers are in contact with each other. Then zero error of the vernier callipers is (take 1 smallest division on main scale as 1mm)