A closely coiled helical spring of radius R, contains n turns and is s – McqOptions

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1.	A closely coiled helical spring of radius R, contains n turns and is subjected to an axial loadW. If the radius of the coil wire is r and modulus of rigidity of the coil material is C, the stress developed in the helical spring is
A.	WR/ 3
B.	2WR/ 3
C.	2WR/ 2
D.	4WR/ 2
Answer» C. 2WR/ 2

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