An aluminium rod of length 90 cm is clamped at its midpoint and is set into longitudinal vibrations by stroking it with resined cloth. Assume that the rod vibrates in its fundamental mode of vibration . The density of aluminium is 2600 kg/m^(3)and its Young's modulus is 7.80 xx 10^(10) N//m^(2). speed of soundin air is 340 m/s. the frequency of the sound produced in air is :

An aluminium rod of length 90 cm is clamped at its midpoint and is set

1.	An aluminium rod of length 90 cm is clamped at its midpoint and is set into longitudinal vibrations by stroking it with resined cloth. Assume that the rod vibrates in its fundamental mode of vibration . The density of aluminium is 2600 kg/m^(3)and its Young's modulus is 7.80 xx 10^(10) N//m^(2). speed of soundin air is 340 m/s. the frequency of the sound produced in air is :
Answer» 3050 HZ 305 Hz 30.5 Hz 3.05 Hz Solution :`V = (v)/(lambda) = (5480)/(180) = 3050` Hz so correct choice is (a) .

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