The zero error of the vernier calipers shown in the figure is _________.

Options

A. `+ 100 mum`
B. `+ 0.01 cm`
C. 0.1 mm
D. All of the above

Answer

D

Explanation

VCD for zero error = 4
Since the zero of the vernier scale is to the right of the zero of the main scale, the error is positive.
` therefore "zero error" = + n xx L.C`
`=+ 4 xx 0.025 mm`
` =+ 0.100 mm`
`=+ 0.01 cm =+ 100 mum`