Question

Explain the terms (i) pitch and (ö) least count of a screw gauge. How are they determined?​

Answer 1

Explanation:

The smallest reading up to which a screw gauge can be measured is called least count of screw gauge. It can be find out by following method; L.C = pitch of screw gauge ⁄ no. of divisions on circular scale i-e 1mm⁄100 = 0.01 mm. The least count error is the error associated with the resolution of the instrument.

Answer 2

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¤ PITCH :- THE PITCH OF A SCREW GAUGE IS THE LINEAR DISTANCE MOVED BY ITS SCREW ON THE MAIN SCALE WHEN THE CIRCULAR SCALE IS GIVEN ONE COMPLETE ROTATION....!

¤ LEAST COUNT :- HOWEVER, THE LEAST COUNT OF A SCREW GAUGE IS THE LINEAR DISTANCE MOVED BY ITS SCREW ALONG THE MAIN SCALE WHEN THE CIRCULAR SCALE IS ROTATED BY ONE DIVISION ON IT. THUS,

LEAST COUNT OF SCREW GAUGE,

L.C. = PITCH OF THE SCREW GAUGE / TOTAL NUMBER OF DIVISIONS ON ITS CIRCULAR SCALE....