Question

A metal wire of linear mass density of 9.8g/m is stretched with a tension of 10kg-wt between two rigid support 1meter apart. The wire passes at its middle point between the poles of a permanent magnet, and it vibrates in resonance when carrying an alternating current of frequency n. the frequency n of the alternating source is_____ A) 50Hz B) 100Hz C) 200Hz D) 25Hz

Answer 1

Answer:

25 Hz

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Answer 2

Answer:

hi don't know how to do it please explain how to do it