Question

By using vernier callipers a length is measured by four students . which one of the following is correct? And why?
A.4.5cm
B.4.51cm
C.4.510cm
D.4.5100cm​

Answer 1

B. 4.51cm is correct

This can be explained as:-

The least count of vernier callipers is 0.01cm that is it can measure up to numbers having 2 limits or resolutions only. Here 4.51cm has 2 resolutions after the decimal point so, that why it is the correct answer.

Cheers!