Question

Exercise
2.
Section A Multiple-Choice Questions
1. In an experiment it is required to measure the distance
between two points which are between 0.7 m to 0.8 m
apart. Which of the following instruments should be
used so that the distance can be measured to within an
accuracy of 0.001 m?
A A half-metre rule.
B. A metre rule.
C A ten-metre measuring tape.
D A metre rule and a pair of vernier calipers.
2. The figure below shows the reading on a micrometer
screw gauge when it is used to measure the diameter of
a thin wire. One complete turn of the thimble is 0.50
mm.​

Answer 1

Answer:

1 = d,,, a metere rule and a pair of venier calipers

Answer 2

D is the correct option- A meter rule with a vernier caliper will be used.

Explanation: A vernier scale, named after Pierre Vernier, is a visual aid for taking an accurate measurement reading between two graduation markers on a linear scale by applying mechanical interpolation, therefore enhancing resolution and minimizing measuring uncertainty by reducing human estimating error.

Vernier calipers are commonly used for quality control measures in scientific facilities and industries. The vernier scale contains 25 divisions in the figure, whereas the normal scale has 24 divisions in the same length.