Fundamentholfundamenthol
JEE Main2019Physics
Q.

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 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]

  1. A

    1.8 × 106 N/m2

  2. B

    1.2 × 106 N/m2 

  3. C

    4.0 × 106 N/m2 

  4. D

    8.0 × 106 N/m2

Solution

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