Charge of uniform linear density 6.0 nc/m is distributed along the x axis from x = 0 to x = 3 m. which of the following integrals is correct for the electric potential (relative to zero at infinity) at the point y = 4 m on the y axis
a. ∫[0,3] 6.0x / √(x² + 4²) dx
b. ∫[0,3] 6.0 / √(x² + 4²) dx
c. ∫[0,3] 6.0 / (x² + 4²) dx
d. ∫[0,3] 6.0x / (x² + 4²) dx