Please help! What is a) the magnitude of the magnetic field at thelocation of th

Question

Please help!

What is a) the magnitude of the magnetic field at thelocation of the particle and b) the current in the wire if a52C charged particle moves parallel to a long wire with aspeed of 720 m/s, the separation between the particle and the wireis 13 cm and the magnitude of the force exerted on the particle is1.4 x 10-7 N?
  
      B = _____________
      I = ______________

Explanation / Answer

We know that            F = Bqv ==> We have           B = F /qv              = 1.4 x 10-7 / 52 * x 10-6 *720              = 3.735 T We know that        B = oI / 2r ==> I = 2r B / o            = 2 * * 0.13 * 3.735 x 10-6 / 4 x10-7            = 2.4 A

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