Which one of the following statements is true concerning the strength of the electric field between two oppositely charged parallel plates? O It is zero midway between the plates. O It is a maximum midway between the plates. O It is a maximum near the negatively charged plate. O It is a maximum near the positively charged plate. O It is constant between the plates except near the edges.

Liquid water has a large dielectric constant of ɛ, = 80. Suppose that a single sodium ion (Na+, carrying a positive charge of +1e) is held in the middle of a beaker of pure water. Compared to the volume of the sodium ion, the volume of the water can be effectively treated as infinite. a) Write down the electric displacement at r distance away from the sodium ion. b) Write down the electric field at r distance away from the sodium ion. c) Write down the electrostatic force that the sodium ion acts on a water molecule that is 2nm away from the ion and oriented with its dipole moment radially away from the ion. d) Calculate the polarization at a distance r = 2nm away from the sodium ion. e) The dipole moment of a water molecule is 6.17 x 10-30C · m. Estimate how much fraction of the water molecules that are at 2nm away from the sodium ion are reoriented by the sodium ion. (Assume that there are only two possible states for these water molecules: either randomly oriented and showing zero…

A proton Q = +e and an electron Q = -e are in a constant electric field created by oppositely charged plates. You release the proton from near the positive plate and the electron from near the negative plate. Which feels the larger electric force? O The electron. O The proton. O Neither-there is no force. O The magnitude of the force is the same for both and in the same direction. O The magnitude of the force is the same for both but in opposite directions.

An electric field of magnitude 5.25 x 10° N/C points due east at a certain location. Find the magnitude and direction of the force on a-4.25 µC charge at this location. N |---Select-- v magnitude direction

A particle with charge +4 nC (a nanocoulomb is 1 x 109 C) is located at the origin. What is the electric field due to this particle at a location m? 7 E = N/C

Charges X (+5 microCoulombs), Y (+5 microCoulombs), and Z (-5 microCoulombs) are located in a straight line with point Y midway between charges X and Z.  Charge X is on the left, Y in the middle, and Z on the right.  Where along the line that passes through the three points could the Electric Field Strength be Zero?  (Include all possible locations.)