A screw gauge has pitch 0.5 mm and 100 circular divisions. PSR = 2.0 mm, CSR = 64 and zero error = −0.02 mm. Enter the corrected reading in micrometres.
Physics · Unit dimension and error · vernier callipers and screw gauge
JEE Mains NEET

Question

A screw gauge has pitch 0.5 mm and 100 circular divisions. PSR = 2.0 mm, CSR = 64 and zero error = −0.02 mm. Enter the corrected reading in micrometres.

G1 Physics · Accepted Answer

LC = 0.005 mm. Observed = 2.0 + 64(0.005) = 2.320 mm. Corrected = 2.340 mm = 2340 μm.