A wire, carrying a current `i`, is kept in the `x-y` plane along the curve `y = A sin ((2pi)/(lambda) x)`. A magnetic field `B` exista in the z-direction. Find the magnitude of the magnetic force on the portion of the wire between `x = 0 and x = lambda`.

Explanation

Magnetic force
` F = i(dL xx B ) ` (Mltagnetic field )
` = iB int _(0) ^(a) dx