JEE Main Physics question
A metal wire of length , area of cross-section and Young's modulus is stretched by a variable force such that is always slightly greater than the elastic forces of resistance in the wire. When the elongation of the wire is ,
Answer: (B),(C)
Solution
Since exceeds the internal elastic resistance by only an infinitesimal amount at every stage, the process is quasi-static: essentially all the work done by converts directly into stored elastic potential
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