A horizontal insulating rod of length 10.5-cm and charge 27 nC is in a plane with a long straight vertical uniform line charge. The linear charge density of the long line charge is 3.0  10-7 C/m. What is the electric force on the rod if the end closest to the line charge is 2.0 cm away? Hint: the electric field from an infinitely long straight uniform line charge is  E(r) =  2 k λ r

Question

A horizontal insulating rod of length 10.5-cm and charge 27 nC is in a plane with a long straight vertical uniform line charge. The linear charge density of the long line charge is 3.0  10-7 C/m. What is the electric force on the rod if the end closest to the line charge is 2.0 cm away? Hint: the electric field from an infinitely long straight uniform line charge is 

E(r) = 
2 k λ
r
 

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