A thin infinite nonconducting sheet with uniform surface charge density σ = 10.0•10-6 C/m2 lies in the y-z plane. A charge Q = 7.50 μC is located on the x axis at a distance x= 30.00 cm from the sheet as shown.
Find the magnitude of the electric field at a point P with the coordinates x= y= 30.00 cm, z= 0.What work must be done against the electric forces in order to move the charge Q from the position x= 30.00 cm to the position x= 10.00 cm on the x axis?