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In an experiment, 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 requires to produced a new 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) 1.8 × 10⁶ N/m²(B) 0.2 × 10⁶ N/m²(C) 1.2 × 10⁶ N/m²(D) 4.0 × 10⁶ N/m²

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