A and B are two steel wires and the radius of A is twice that of B. If they are stretched by the same load, then the stress on B is .....
(a) four times that of A.
(b) two times that of A.
(c) three times that of A.
(d) same as that of A.
The ratio of diameters of two wires of the same material and length is n : 1. If the same load is applied to both the wires then increases in the length of the thin wire is ........................ (n > 1).
- n1/4 times
- n1/2 times
- n times
- n2 times
A mass of 1 kg is hung from a steel wire if radius 0.5 mm and length 4 m. Calculate the extension produced. What should be the area of cross-section of the wire so that elastic limit is not exceeded? Change in radius is negligible
(Given : g = 9.8 m/s2; Elastic limit of steel is 2.4 x 108 N/m2;Y for steel (Ysteel) = 20 x 1010 N/m2; π = 3.142)