A charge of 29.0 nC is uniformly distributed along a thin, flexible rod of lengt

Question

A charge of 29.0 nC is uniformly distributed along a thin, flexible rod of length 23.0 cm. The rod is then bent into a semicircle as shown in the figure.

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Explanation / Answer

Here, radius = 0.23/(3.14)

                      = 0.0732 m

=> Electric field at centre = 2KQ/(3.14*r*r)

                                          = (2*8.98*109*29*10-9)/(3.14*0.0732*0.0732)

                                           = 3.095*104 N/C     ----------------> directed towards + x axis horizontally

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