Question: A thin rod with charge Q is bent into a semi-circle of radius R. During the practical session of last week you proved that the

A thin rod with charge Q is bent into a semi-circle

A thin rod with charge Q is bent into a semi-circle of radius R. During the practical session of last week you proved that the electric eld for this conguration has a magnitude given by E = 27:60 le where A is the charge per unit length in the rod. How does the eld of this charged semi-circle compare with the eld from a point charge Q located at a distance R? Qualitatively justify your comparison

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