A uniformly charged rod of length L = 1.2 m lies along the x-axis with its right end at the origin. The rod has a total charge of Q = 6.8 μC. A point P is located on the x-axis a distance a = 1.2 m to the right of the origin. A: Calculate the magnitude of the electric field E in kilonewtons per coulomb (kN/C) at point P due to the charged rod.  B: Write an equation for the electric field dE at point P due to the thin slide of the rod dx. Give your answers in terms of the variables Q, L, x,

 A uniformly charged rod of length L = 1.2 m lies along the x-axis with its right end at the origin. The rod has a total charge of Q = 6.8 μC. A point P is located on the x-axis a distance a = 1.2 m to the right of the origin.

A: Calculate the magnitude of the electric field E in kilonewtons per coulomb (kN/C) at point P due to the charged rod. 

B: Write an equation for the electric field dE at point P due to the thin slide of the rod dx. Give your answers in terms of the variables Q, L, x, a, dx, and the Coulomb constant, k. Notice that the coordinate x will be less than zero over the length of the rod.