27. Why the spring is made up of steel in comparison of copper
27. Why the spring is made up of steel in comparison of copper
(a) Copper is more costly than steel
(b) Copper is more elastic than steel
(c) Steel is more elastic than copper
(d) None of the above
ANSWER-C
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(a) – 5 J (b) – 10 J (c) – 15 J (d) – 20 J Answer-a