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sonometer wire of length 76cm is maintained under a tension of 45N and alternating current is passed through the wire. A horse-shoe magnet is placed with its poles either sides of the wire at its midpoint and the resulting forces set the wire into resonant vibration. If the density of the material of the wire is 8800kgm-3 and the diameter of the wire is 1mm, what is the frequency of ac
Sagot :
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