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 load W. If the radius of the coil wire is r and modulus of rigidity of the coil material is C, the deflection of the
A.	WR3n/Cr4
B.	2WR3n/Cr4
C.	3WR3n/Cr4
D.	4WR3n/Cr4
Answer» E.

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