Why we use fuse? It is so that in case of power fluctuations, our stablizer orElectrical appliance don't get damage. In place of that a dirt cheap fuse will sacrifice it's life and save everything else.
Similarity in Mechanical engineering, we learned about factor of safety. It is something like if a man is able to lift 20 kg then we say that he can lift 10 kg. ( Factor of safety is 20/10 i.e. 2). Also while designing machines we make one cheap component a little weaker compared to others and hence when machine will undergo damage then the expensive parts are safe and a cheaper component is sacrificed.
It's logical and practice approach.
Similarity in Mechanical engineering, we learned about factor of safety. It is something like if a man is able to lift 20 kg then we say that he can lift 10 kg. ( Factor of safety is 20/10 i.e. 2). Also while designing machines we make one cheap component a little weaker compared to others and hence when machine will undergo damage then the expensive parts are safe and a cheaper component is sacrificed.
It's logical and practice approach.
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