Question

Thickness of a cylinder measured using a
screw gauge of least count 0.01 cm is found to
be equal to 0.80 cm. The percentage error in
measurement is
2.5%
1.25%
5%
0.5%​

Answer 1

Given,

Thickness (t)= 0.802cm

Least count= 0.001 cm

now error in measuring t=(0.802±0.001)

So, percentage error=0.001/0.802×100%

=0.1246%

≈0.125%