Question

State the difference between positive and negative zero error of a screw gauge.

  • Category: Measurement Class 9 ICSE
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Answer

If on bringing the flat end of the screw in contact with the stud, the zero mark on the circular scale is below the base line of the main scale, the zero error is said to be positive and if the zero mark on the circular scale is above the base line of the main scale, the zero error is said to be negative.

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