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प्रश्न
What do you mean by a negative zero error of a screw gauge? How will you calculate it?
टीपा लिहा
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उत्तर
If the zero of the circular scale lies above the line of graduation then it is called negative zero error. When there is a negative zero error, then the instrument reads less than the actual reading. Therefore in order to get the correct reading, the zero error should always be added to the observed reading.
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