JEE Mains · Physics · STD 11 - 1. units,dimensions and measurement
In a screw gauge, the zero of the circular scale lies 3 divisions above the horizontal pitch line when their metallic studs are brought in contact. Using this instrument thickness of a sheet is measured. If pitch scale reading is 1 mm and the circular scale reading is 51 then the correct thickness of the sheet is ___________ mm.
[Assume least count is 0.01 mm ]
- A 1.50
- B 1.48
- C 1.54
- D 1.51
Answer & Solution
Correct Answer
(C) 1.54
Step-by-step Solution
Detailed explanation
Zero error \( e=-3\times LC=-0.03 \) mm Reading taken =1mm + 51(0.01mm) = 1.51 mm So, Correct reading \( = 1.51 - (-0.03)\) = 1.54 mm
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