Determine the least count l.c of vernier caliper if smallest division on main scale is 1mm and the number of decision on vernier scale is 50.
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Least count means smallest length that can be measured using an instrument. Generally in a vernier callipers N main scale divisionscoincide with N-1 vernier scale divisions. Therefore, Least Count = 1 MSD - 1VSD = 1mm - (16/20)*1mm = 4/20 mm = 0.2mm that is option D
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