Two rod A and B of the same material and dame length have radii `r_(1) and r_(2)` respectively. When they are rigidly fixed at one end and twisted by the same couple applied at the other end, find the ratio of the angles of twist at the ends of A and B.

Two rods A and B of the same material and length have radii r_(1) and r_(2) respective. When they are rigidly fixed at one end and twisted by the same torque applied at the other end, the ratio [("the angle of twist at the end of A")/("the angle of twist at the end of B")] equal to

Two rods A and B of the same material and length have radii r_(1) and r_(2) respective. When they are rigidly fixed at one end and twisted by the same torque applied at the other end, the ratio [("the angle of twist at the end of A")/("the angle of twist at the end of B")] equal to

Two wires of same material and same length have radii r_1 and r_2 respectively. Compare their resistances.

Two wires A and B of same length and of the same material have the respective radii r_(1) and r_(2) . Their one end is fixed with a rigid support, and at other end equal twisting couple is applied. Then the ratio of the angle of twist at the end of A and the angle of twist at the end of B will be