a) Define magnetic field.b) A long straight wire carries 7 A current. At a distance 4 mm from the wire, a particle is moving parallel to it. If the charge of the particle is 8 mu C and moves with 200 ms^{-1}. Find1b) the magnetic flux density, 4 mm from the wire.2b) the magnetic force exerted on the particle.

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Quinn Alvarez · Accepted Answer

Given Current ,I =7 A Distance ,D = 4 mm Charge,Q = 8uC Velocity, V = 200 m/s parallel to current direction.Part A.Magnetism/magnetic force is the force due to moving electric charges, and the nearby space to the moving charge particle, within which the magnetic force can be experienced on other particles is defined as magnetic field.Part B1b)Magnetic flux density is given as   B  =      u    0    ⋅      I          2      π      R          B  =  2  ⋅      10          −      7        ⋅      7          4      ⋅              10                  −          3                      =  3.5  ⋅      10          −      4           T  e  s  l  a 2b)Now force is   F  =  q  ⋅  V  ⋅  B  ⋅  sin  ⁡  (  A  )Where A is angle between B and V direction   A  =      90          ∘          F  =  8  ⋅      10          −      6        ⋅  200  ⋅  3.5  ⋅      10          −      4        =  5600  ⋅      10          −      10          F  =  0.56     u  N

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