SI unit is used for scientific work
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Answer:
Why is the SI unit used in scientific work?
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You would never use the British Imperial system to do electrical calculations for a start since the theory was originally formulated in the centimeter gram second system which was subsequently upgraded to the SI metric system.
The SI system of metric units is very practical because the meter, kilogram, second and ampere used in theoretical computations in electrical and mechanical engineering correspond to actual everyday units used to rate household appliance electricity consumption and for customary weights and measures.
In electrical theory, the electrostatic and electromagnetic systems, that is the c.g.s. system, are related through the constant 2.997… x 10^{10} cm/second, the speed of light denoted by c, but different units are used for electric charge and electric current in the c.g.s. electrostatic system and the electromagnetic system.
In the SI metric system this situation is eliminated by having the electrostatic constant k[0] related to the electromagnetic constant mu[0] by the relation k[o].mu[0] = 1/c^{2} where c = 2.998… x 10^{8} meters per second. These constants are referred to free, empty space. The magnetic constant, mu[0] is defined to be 4.pi x 10^{ - 7}. This fixes the SI electrostatic constant as k[0] = 1/[m[0].c^{2}] = 1/[4.pi x 10^{ - 7} c^{2}]. That is: k[0] = 10^{9}/[4.pi x 8.982]. The speed of light, c is a universal natural constant.
In this way electrostatic and electrostatic quantities are measured in the same SI units: meters, seconds, amperes, coulombs, newtons, Joules, Watts etc. unlike in the c,g.s. system of electrostatics and magnetism, each of which use different units connected in various ways by the speed of light.
The SI metric system results in a major simplification of electromagnetism.
Explanation:
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Answer:
There are seven base units in the SI system:
the kilogram (kg), for mass.
the second (s), for time.
the kelvin (K), for temperature.
the ampere (A), for electric current.
the mole (mol), for the amount of a substance.
the candela (cd), for luminous intensity.
the meter (m), for distance.