The pitch of a screw gauge is 1 mm and there are 50 divisions on its cap. When nothing is put in between the studs, 44 th division of the circular scale coincides with the reference line. When a glass plate is placed between the studs, the main scale reads three divisions and the circular scale
reads 26 divisions. Calculate the thickness of the plate –
Text Solution
Verified by ExpertsThe correct answer is:
D
LC = 
mm = 0.02 mm
error = – 6 × 0.02 = – 0.12
observed reading = 3 mm + 26 × (0.02) mm
= 3.52 mm
true reading = 3.52 – (– 0.12) = 3.64 mm
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