A vernier callipers has its main scale graduated in mm and 10 divisions on its vernier scale are equal in - Physics - Measurements and Experimentation

Question

A vernier callipers has its main scale graduated in mm and 10
divisions on its vernier scale are equal in length to 9 mm When the
two jaws are in contact the zero of vernier scale is ahead of zero
of main scale and 3rd division of vernier scale coincides with a
main scale division Find (1)the least count and (2) the zero error
of the vernier calliper

Priyanka Sahu · Accepted Answer

Dear Student ,

least count = length of one mai scale reading - length of one vernier scale reading=1mm -910mm = 1-0
9 mm = 0 1 mm = 0
0001 mZero error:no
 of divisions on auxillary - no
 of division coinside×lear count of vernier scale:= 10-3×0
1 = 0
7 mmthis is the positive zero error

Regards