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What is the net electric potential at point P due to the four particles if V = 0 at infinity, q = 7.00 fC, and d = 4.00 cm? +q +q -9

A hollow metal sphere has a radius of 5.00 cm. If an excess charge of 50.0 uc resides on the sphere, what is the electric potential 10.0 cm from the surface of the sphere?

The thin plastic rod of length L = 18.2 cm in the figure has a nonuniform linear charge density λ= cx, where c= 24.8 pC/m. (a) With V=0 at infinity, find the electric potential at point P₂ on the y axis at y D=4.90 cm. (b) Find the electric field component Ey at P₂. (a) Number i (b) Number i D d- Units V Units V/m

Two concentric spherical conductive shells of radii 5 cm and 10 cm are charged with 6 µC and 1 µC, respectively. What is the electric potential at r=0, r=7.5cm, and r=15cm? V1= Enter a number. ix V, V2= V, V2= V.

In the figure, three thin plastic rods form quarter-circles with a common center of curvature at the origin. The uniform charges on the three rods are Q = 30 nC, Q, = 3•Q1, and Q3 = 8.Qj. What is the net electric potential at the origin due to the rods? Give your answer in volt. (ke = 1/4ne, = 9.0 x 10° Nm²/C?) y (cm) 4.아 2.0 1.0 - x (cm) %3D

I'm having trouble finding the solution to this problem. This problem is based off the textbook "Physics: Principles with Applications, 7th edition by Douglas C. Giancoli" chapter 16.

A ring of radius R = 4cm lies in the y-z plane and is centered at the origin. The ring carries a uniform charge Q = 48μC. A point P is located along the x-axis a distance x = 3.9 cm from the origin. The equation for electric potential at point P due to charge on the ring can be represented as V = (kQ)/(R2+x2)0.5.  Using the equation for electric potential as a function of x, derive an equation for the electric field along the positive x-axis. Give the answer in terms of the variables Q, R, x, and Coulomb constant k. Calculate the magnitude of the elctric field at point P in units of meganewtons per coulomb (MN/C)