In a shaft rotated by a couple, the shear force varies
(A) From zero at the centre to a maximum at the circumference
(B) From minimum at the centre of maximum at the circumference
(C) From maximum at the centre to zero at the circumference
(D) Equally throughout the section
(A) From zero at the centre to a maximum at the circumference
(B) From minimum at the centre of maximum at the circumference
(C) From maximum at the centre to zero at the circumference
(D) Equally throughout the section