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Two full turns of the circular scale of a screw gauge cover a distance of 1 mm on its main scale. The total number of divisions on the circular scale is 50. Further it is found that the screw gauge has a zero error of -0.03 mm. While measuring the diameter of a thin wire, a student notes the main scale reading of 3 mm and the number of circular scale division in line with the main scale as 35. The diameter of the wire is |
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Answer» `3.32` MM MAIN scale reading =`3mm`. Vernier scale reading =`35` `:.`Observed reading `=3+0.35=3.35` zero ERROR`=-0.03` `:.`ACTUAL diameter of the the wire `=3.35-(-0.03)` `=3.38mm` `(d)` is the correct CHOICE. |
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