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Waves question

2003 · Shift 0 · Q163
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Waves question

2003 · Shift 0 · Q163

JEE MainPhysicsWavesMCQ+4 / −1
A metal wire of linear mass density of 9.8g/m9.8g/m9.8g/m is stretched with a tension of 10kg10kg10kg-wtwtwt between two rigid supports 111 metre 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.n.n. The frequency nnn of the alternating source is
  1. A
    50Hz50Hz50Hz
  2. B
    100Hz100Hz100Hz
  3. C
    200Hz200Hz200Hz
  4. D
    25Hz25Hz25Hz
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