Necessity of Measurement

We have so far discussed a major section of electrical technology. We have theorized different electrical, electro-mechanical (dynamic machines: motor, generator) and electro-magnetic (static machine: transformer) systems. From these theories we have derived a large number of equations. From these equations we have generated numerical problems and we have found the solutions. At this stage the most obvious question that should incite a rational mind is ‘Why’? Why we have taken all these efforts? If we think quietly, we should realize that one of the most important mottos of human science and technology is to quantify different physical or social parametres which can affect our system. The quantification implies the estimation of the parametres in terms of number system. We, the human mind cannot think much without numbers. So our constant effort has been to put everything into number which does or may have any impact on our lives. Not only the physical parametres but also some social parametres are weighed in terms of number. Like in democracy the opinions of people are counted by votes. The wealth is counted by currency. The merit of a student is estimated by the marks awarded to him in examination. Even in today's life your popularity is counted by the number of ‘likes’ offered by your friends in social networking media. In technical industry, the same effort is strongly needed for two aspects. One, the economic aspect and the other is the scientific aspect. The economy and cost is immensely related to the production of an industry at different level.