When does the engineering started? It is a very complex question. Because, people started to construct simple machines before engineering profession is defined. According to that concept we may say ancient times. Because people started to produce simple machines like pulleys, lever and wheels at that time. Some people also started to build tools very long long time ago. These are all before 5000 BC. Except those we may check the written sources to track.
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EE99 – CAPACITOR VALUE READING TABLE
Capacitor manufacturers generally give the value of capacitor on capacitor but, in some cases there may be not enough space. In that case, they use simple notation. If it is 2 digits number then no issues. You can say the value seen is the value on capacitor. But if it has 3 digits then the first two digit you take as is and remaining last digit is the number of zeros following that first two digits. See table below;
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