Question

In the given figure, find the magnitude and nature of zero error.

Answer 1

Here, zero of vernier scale lies to the right of zero of main scale. Hence, it has positive zero error.
Further, $N=0,x=5,LCorVC=0.01cm$
Hence, Zero error $=N+x\times VC$
$=0+5\times 0.01$
$=0.05$ cm
Zero correction $=0.05cm$
$\therefore$ Actual length will be $0.05cm$ less than the measured length.Hence negative zero error is present.