What is a physical standard? What characteristics should it have? 

Asked by mail2koka | 12th Sep, 2016, 08:17: PM

Expert Answer:

Those quantities which can be measured and in terms of which the laws of physics are described are called physical quantities. Eg., length, mass, time, temperature etc.
 
In measurement process, a physical quantity is compared with a standard quantity. This statndard quantity is called a unit.
A physical standard must have following characteristics:
1. Invariability
2. Accessibility
3. Reproducibility
4. Indestructibility

Answered by Yashvanti Jain | 14th Sep, 2016, 10:04: AM