length for each arc is λ= q/Lwhere each charge qis specified in the figure. Following the steps that lead to Eq. 22-21 in Sample Problem 22-3, we find 312net220102030(2sin45 )(2sin 45 )4442QErrrRλπε°°°=++=which yields Enet= 1.62×106N/C . (b) The direction is – 45º, measured counterclockwise from the +
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