When a closely-coiied helical spring of mean diameter (D) is subjected to an axial load (W), the deflection of the spring ( ) is given by (where d = Diameter of spring wire, n = No. of turns of the spring, and C = Modulus of rigidity for the spring material)

When a closely-coiied helical spring of mean diameter (D) is subjected

1.	When a closely-coiied helical spring of mean diameter (D) is subjected to an axial load (W), the deflection of the spring ( ) is given by (where d = Diameter of spring wire, n = No. of turns of the spring, and C = Modulus of rigidity for the spring material)
A.	<img src="/_files/images/mechanical-engineering/strength-of-materials/113-315-1.png">
B.	<img src="/_files/images/mechanical-engineering/strength-of-materials/113-315-2.png">
C.	<img src="/_files/images/mechanical-engineering/strength-of-materials/113-315-3.png">
D.	<img src="/_files/images/mechanical-engineering/strength-of-materials/113-315-4.png">
Answer» E.