Need of standardization of physical quantities

Q. What are the important criteria for standardization of a unit?

1. The unit should yield the same result irrespective of when the unit is being used.
2. The unit should yield the same result irrespective of whoever is using it.
3. The unit should yield the same result irrespective of where the unit is being used.
4. The unit should yield the same result irrespective of the physical quantity being measured.

Q.

What do you mean by standard unit? Lists its characteristics?

Q.

Give two things that constitute measurement.

Q. The magnitude of a physical quantity does not depend on the method of measurement.

1. True
2. False

Q. A standardized unit needs to be

1. accurate to the highest degree.
2. easily accessible.
3. reproducible.
4. invariant across time and space.

Q.

A standard unit should:

1. be convenient in size

2. not change with change in place

3. not change with time

4. all of these

Q. Using the human body parts as a standard for measurement is a universally accepted idea.

1. False
2. True

Q.

Define these terms:

Measurement?