What is zero error of a vernier callipers..
Answers
Explanation:
Zero error is defined as the condition where a measuring instrument records a reading when no reading is required. In case of Vernier calipers it occurs when a zero on the main scale does not coincide with a zero on Vernier scale it is called zero error for Vernier.
Answer:
Zero error is defined as the condition where a measuring instrument records a reading when no reading is required. In case of Vernier calipers it occurs when a zero on the main scale does not coincide with a zero on Vernier scale it is called zero error for Vernier.
Explanation:
Zero errors are of two kinds, they are:
⋅ Negative zero error: if the zero mark of the
vernier scale is on the left part of the zero mark of the main scale upon
bringing the two jaws together, it is a negative zero error.
To find negative zero error, the division of the vernier scale that coincides with any division of the main scale should be observed and noted.
The number appearing at this vernier division is subtracted from the total number of divisions on the vernier scale and then the difference is multiplied by the least count.
The total number of division on the callipers is .
Here, in the example (scale), the L.C. = cm, the 6
th
division of the vernier scale coincides with a particular division of the main scale.
So, the zero error is,
=(10−6)×L.C
(−4)×0.1×0.1
=−0.04cm
In order to correct the measurement of the vernier callipers
with zero error, the zero error with proper sign is subtracted always from the observed reading.
therefore , Correct reading = observed reading - zero error