alleryScrew gauge: pitch 0.5 mm, 50 divisions on circular scale. Least count:
ACannot calculate
B0.01 mm
C1 mm
D0.5/50 = 0.01 mm
Answer & Solution
Correct answer: B. 0.01 mm
LC of screw gauge = pitch / no. of circular divisions = 0.5/50 = 0.01 mm = 10 μm.
Used to measure thin objects.
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