A student measured the length of a rod and wrote it as 3.50 cm. Which instrument did he use to measure it :A meter scaleA vernier calliper where the 10 divisions in vernier scale matches with 9 divisions in main scale and main scale has 10 divisions in 1 cmA screw gauge having 100 divisions in the circular scale and pitch is 1 mmA screw gauge having 50 divisions in the circular scale and pitch is 1 mm

The length of an object is measured three times using a meter stick with smallest graduation of 0.1 cm on the stick. The measurements are 6.15 cm, 6.15 cm and 6.15 cm. The measurement error is:

Which one of the following instrument is most suitable for measuringthickness ofthe physics book?A. Meter rule B. Vernier calipersC. Measuring tape D

The pitch and the number of divisions, on the circular scale for a given screw gauge are 0.5 mm and 100 respectively. When the screw gauge is fully tightened without any object, the zero of its circular scale lies 3 division below the mean line. The readings of the main scale and the circular scale, for a thin sheet, are 4.5 mm and 48 respectively, the thickness of the sheet is:

The whole length of a metre scale is divided into500 equal parts then the smallest measurementthat can be measured by using the scale is _______.(a) 0.5 m (b) 0.005 m(c) 50 mm (d) 2 mm

Which of the following should NOT be done when measuring the length of a rod using a ruler?a.place the zero-mark of the ruler on the middle of the rodb.place the ruler right beside the rodc.place the rod on a flat surfaced.record the measurement using your notebook or lab worksheet