Please see attached file 4. for the following problems:

6. At each point on the surface of the cube shown in Figure 23-27, the electric field is parallel to z-axis. The length of each edge of the cube is 3.0 m. On the top face of the cube, E = -34k N/C, and at the bottom face E = +20k N/C. Determine the net charge contained within the cube.

29. A long, straight wire has fixed negative charge with a linear charge density of magnitude of 3.6 nC/m. The wire is to be enclosed by a coaxial, thin walled nonconducting cylindrical shell of radius 1.5 cm. The shell is to have positive charge on its outside surface with a surface charge density sigma that makes the net external electric field zero. Calculate sigma.

9. A nonconducting sphere has radius R = 2.31 cm and uniformly distributed charge q = + 3.50 fC. Take the electric potential at the sphere's center to be V0 = 0. What is V at radial distance (a) r = 1.45 cm, and (b) r = R.

54. A hollow metal sphere has a potential of +400 V with respect to ground (defined to be at V = 0) and a charge of 5.0 * 10^(-9) C. Find the electric potential at the center of the sphere.

12. The battery has a potential difference of V = 10.0 V and five capacitors each have a capacitance of 10.0 uF. What is the charge on (a) capacitor 1 and (b) capacitor 2?

The solution is comprised of detailed calculations of the electric field and electric potential when the charges are uniformly distributed over cube, long straight wire, and sphere, etc.

Hi. Can someone please explain to me what exactly the electricpotential is and how it differs from electricpotential energy -- not with equations, but in prose. (Or at least, with both.) I can read the equation, but I don't really understand what electricpotential IS. What is its significance?
Thank you!

Please help with the following problems.
1. In the figure, two charges q1=+3.0uC and q2=-2.0uC are separated by 6.0cm.
a. Find the electric forces exerted on each other (magnitude and direction)
b. Find the electricfield from point P, which id 4.0cm to the right q2 (megnitude and direction).
c. Find the positions along t

Problem 1
A charge is moved from one place to another in an electricfield. In which of the following situations will the change in potential energy be NON-ZERO?
the charge is only moved perpendicular to all electricfield lines that it crosses
the charge remains unmoved
the charge is moved along an equipotential surfa

Point charges q1=- 5.00 nC and q2=+ 5.00 nC are separated by distance 3.80 mm, forming an electric dipole.
A) Find the magnitude of the electric dipole moment in Cm.
B) The charges are in a uniform electricfield whose direction makes an angle 36.5 degrees with the line connecting the charges. What is the magnitude of this

Four quick conceptual questions:
1) Is the electricfield (E = -delta V / delta s) always a positive number (or zero)? That is, is it always the absolute value of the magnitude of the electricfield? Or can it have a negative value?
2) Is electricpotential (delta V) always negative? The answer to one of the questions in m

Does the electricfield always move from positive to negative?
If I'm told that a uniform electricfield of magnitude 4.1 x 10^5 N/C points in the positive x direction, and a 4.5 micro-C charge moves 6.0 m in the positive x direction, and to find the electricpotential energy (which is -11 J), does my equation look like this:

A charge isolated metal sphere of diameter 10cm has a potential of 8000 V relative to V=0 at infinity. Calculate the energy density in the electricfield near the surface of the sphere?

Please refer to the attachment for more details (figures and hints) on the question.
Consider a circular disk with radius R that has a uniformly distributed surface charge of Q.
(a) Calculate the electricpotential (Phi) at various points along the central axis of this disk.
(b) Use the result of part (a) to determine t

The electricfield is defined as the electrostatic force divided by the charge experiencing this force. The Earth's electricfield is directed radially inward and is about 150 N/C at the Earth's surface. This arises because in a region of the atmosphere known as the ionosphere, parts of the spectrum of the radiation from the sun

A point charge of -6.8 µC is at the origin.
(a) What is the electricpotential due to this charge at (-2.0 m, 0)?
(b) What is the electricpotential to this charge at (2.0 m, -2 m)?