Fuse selection is important in an electrical circuit, because a very rapid acting fuse might open in 0.1 seconds, a fast acting fuse might open in one second, and a slow acting fuse might take tens of seconds to open if a current of 20A was flowing through a fuse rated at 10A.
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BRIEF HISTORY OF THE ENGINEERING
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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