Question

On closing the jaws of a vernier calipers, zero of the vernier scale is on the right to
its main scale such that 4th division of its vernier scale coincides with one of the
main scale division. Find its zero error and zero correction.

Answer 1

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Given Data:

n = 4

L.c. = 0.01 cm

Main scale Reading = 0.00cm

Zero error = ?

Zero correction = ?

Solution:

Main scale reading = 000cm

Vernier scale reading = (L.C × n)

= (0.01 × 4)

= 0.04 cm

As,

The zero of the Vernier scale is on the right side of the main scale zero

So error is positive

Zero Error = + (main scale reading + Vernier scale reading)

= + (0.00 + 0.4)

Zero Error = + 0.04 cm

Note:

If error is positive then the correction applied will be negative and vice versa.

Result:

Zero Error = +0.04 m , Zero correction = - 0.04cm

Answer 2

Zero Error = +0.04 m , Zero correction = - 0.04cm