A steel wire of length 1 m and mass 1 gm and having a uniform cross-sectional area of 10–6 m2 is rigidly fixed at both the ends. The temperature of the wire is lowered by 20°C. If the transverse standing wave are set up by plucking the string in the middle, the frequency of the fundamental mode of vibration is
(Ysteel = 2 × 1011 N/m2 , αsteel = 1.21 × 10–5 /°C)
(A) 110 Hz
(B) 1.1 Hz
(C) 1100 Hz
(D) 11 Hz
