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Which of the ...

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Which of the following measures a small length to a high accuracy : metre rule, vernier callipers, screw gauge ?

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Screw gauge measures a length to a high accuracy.

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Q. Which of the following measures a small length to a high accuracy,
a) Meter scale
b) Vernier callipers and
c) Screw gauge

The diameter of a thin wire can be measured by :

(a) a vernier callipers (b) a metre rule

(c) a screw gauge (d) none of these.

The scales - vernier callipers, metre scale and screw gauge has the least counts:

Q. A vernier callipers is more accurate in measurement than a screw gauge.

Q. Answer the following : (a)You are given a thread and a metre scale. How will you estimate the diameter of the thread ? (b)A screw gauge has a pitch of 1.0 mm and 200 divisions on the circular scale. Do you think it is possible to increase the accuracy of the screw gauge arbitrarily by increasing the number of divisions on the circular scale ? (c) The mean diameter of a thin brass rod is to be measured by vernier callipers. Why is a set of 100 measurements of the diameter expected to yield a more reliable estimate than a set of 5 measurements only ?

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