In an environment, brass and steel wires of length 1 m each with areas of cross section 1 mm2 are used. The wires are connected in series and one end of the combined wire is connected to a rigid support and other end is subjected to elongation. The stress required to produce a net elongation of 0.2 mm is,[Given, the Young’s modulus for steel and brass are, respectively, 120 × 109 N/m2 and 60 × 109 N/m2]

In an environment, brass and steel wires of length 1 m each with areas

1.	In an environment, brass and steel wires of length 1 m each with areas of cross section 1 mm2 are used. The wires are connected in series and one end of the combined wire is connected to a rigid support and other end is subjected to elongation. The stress required to produce a net elongation of 0.2 mm is,[Given, the Young’s modulus for steel and brass are, respectively, 120 × 109 N/m2 and 60 × 109 N/m2]
A.	8 × 106 N/m2
B.	4.0 × 106 N/m2
C.	1.8 × 106 N/m2
D.	0.2 × 106 N/m2
Answer» B. 4.0 × 106 N/m2