When a closely coiled helical spring is subjected to a couple about its axis, the stress induced in the wire material of the spring is

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Q. When a closely coiled helical spring is subjected to a couple about its axis, the stress induced in the wire material of the spring is

(A) Bending stress only
(B) A combination of torsional shear stress and bending
(C) Direct shear stress only
(D) A combination of bending stress and direct shear stress

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✅ Correct Answer: (A) Bending stress only

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