07. Long Answer Type Questions: (Any 3)
(a) What are SI units? What are the advantages of Sl units over traditional units?
Answers
Answer:
The International System of Units (abbreviated SI from systeme internationale , the French version of the name) is a scientific method of expressing the magnitudes or quantities of important natural phenomena. ... All SI units can be expressed in terms of standard multiple or fractional quantities, as well as directly. Advantages of SI system of units are: (i) SI is coherent system of units, i.e., a system based on certain set of fundamental units. (ii) SI is rational system of units. i.e., it assigns only one unit to a particular physical quantity. ... (iv) SI is internationally accepted system of units.
Answer:
a. The answer to what is SI unit is that it is an abbreviation of the French word Système International. The International System Of Units (SI) is the metric system that is used universally as a standard for measurements. SI units play a vital role in scientific and technological research and development.
b. Advantages of Si units over traditional units. The greatest advantage of SI is that it has only one unit for each quantity (type of measurement). This means that it is never necessary to convert from one unit to another (within the system) and there are no conversion factors for students to memorize.
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