A standard screw gauge has a negative error of 7 divisions. While measuring the diameter of a wire the reading on the main scale is 2 divisions, and the 72 nd circular scale division coincides with the base line. If the division on the main scale are 10 to a centimeter and the circular scale has 100 divisions, then calculate the correct division.
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least count= 1mm/100 = 0.01 mm
negative error= -7×0.001= -0.07
original reading = 2+(72×0.01)=2.72mm
corrected value= 2.72-0.07=2.65
negative error= -7×0.001= -0.07
original reading = 2+(72×0.01)=2.72mm
corrected value= 2.72-0.07=2.65
Anonymous:
Thanks for the answer
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