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46.A force of 200 N is applied at one end of a wire of length 2 m and having area of cross-section

46.A force of 200 N is applied at one end of a wire of length 2 m and having area of cross-section 10-2 cm2 . The other end of the wire is rigidly fixed. If coefficient of linear expansion of the wire α= 8×10-6/°C  Young’s modulus 2.2×1011 N/m2 and its temperature is increased by 5°C, then the increase in the tension of the wire will be

(a)       4.2 N                                                (b)   4.4 N

(c)   2.4 N                                                     (d)   8.8 N

Answer-d

(12)

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