1.

Two rods A and B of the same material and length have their radii r_(1) and r_(2). If they are rigidly fixed at one end and twisted at other end by the same couple, then the ratio of their angles of twist is :

Answer»

`(r_(1)^(2))/(r_(2)^(2))`
`(r_(1)^(3))/(r_(2)^(3))`
`(r_(1)^(4))/(r_(2)^(4))`
`(r_(2)^(4))/(r_(1)^(4))`

Solution :`tau=(pietar^(4)THETA)/(2l)`
`rArrtheta=(tau2l)/(pietar^(4))`
`rArrthetaprop1/(r^(4))`
`therefore(theta_(1))/(theta_(2))=(r_(2)^(4))/(r_(1)^(4))`
So the correct CHOICE is (d).


Discussion

No Comment Found

Related InterviewSolutions