Two rods A and B of same material and length have their radii r_(1) and r_(2) respectively. When they are rigidly fixed at one end and twisted by the same couple applied at the free end, the ratio ( cancel(O)_(A))/( cancel(O)_(B))= ( "angle of twist at the end of A")/( "angle of twist at the end of B")

Two rods A and B of same material and length have their radii r_(1) an

1.	Two rods A and B of same material and length have their radii r_(1) and r_(2) respectively. When they are rigidly fixed at one end and twisted by the same couple applied at the free end, the ratio ( cancel(O)_(A))/( cancel(O)_(B))= ( "angle of twist at the end of A")/( "angle of twist at the end of B")
Answer» `(r_(1)^(2))/( r_(2)^(2) )` `(r_(1)^(3) )/( r_(2)^(3))` `( r_(2)^(4) )/( r_(1)^(4) )` `( r_(1)^(4) )/( r_(1)^(4) )` Answer :C