explain why the heating effect the electric current is termed as necessary evil?
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Frictional force causes a lot of losses in general upkeep and wear and tear of machinery. Hence it is considered as a evil. ... Basic activities like walking and writing on a surface are possible due to friction. Hence it is considered as a necessary evil .
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Yes, friction is a necessary evil. While friction is useful while we walk , write, play, run , etc but it can also be harmful to us like fire accidents, wear and tear. In this article , we explain and justify why we friction a necessary evil with some examples and a comic strip.
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