Physics - Unit & Dimension Question with Solution | TestHub
When numbers having uncertainties or errors are used to compute other numbers, these will be uncertain. It is especially important to understand this when a number obtained from measurements is to be compared with a value obtained from theoretical prediction. Assume a student wants to verify the value of π the ratio of circumference to diameter of a circle. The correct value of ten digits is 3.141592654. He draws a circle and measures its diameter and circumference to its nearest millimeter obtaining the values 135
mm and 424 mm, respectively. Using a calculator he finds π = 3.140740741.
Why does measured value not match with calculated value ?
Options:
Answer:
Solution:
When an instrument is used to measure, it has its least count. Therefore, we can measure the value to nearest correct value and not absolute value.