A vernier callipers is more accurate in measurement than a screw gauge.
Four screw gauges are to be calibrated to the standard thickness tst of a wire. Series of measurements were performed by each instrument to obtain a distribution of the measured values as shown. Which of the following statements is correct?
Which of the following measures a small length to a high accuracy : metre rule, vernier callipers, screw gauge ?
The scales - vernier callipers, metre scale and screw gauge has the least counts: