Two 2.0-cm-diameter insulating spheres have a 5.50 cm space between them. One sphere is charged to + 35.0 nC , the other to - 14.0 nC . What is the electric field strength at the midpoint between the two spheres? Express your answer with the appropriate units. ? Value N/C

Suppose a speck of dust in an electrostatic precipitator has 1.0000×1012 protons in it and has a net charge of –5.00 nC (a very large charge for a small speck). a. Find the electric charge due to the protons in the dust. Calculate the charge due to only the protons.

Two 10-cm-diameter charged rings face each other, 15.0 cm apart. Both rings are charged to +50.0 nC. What is the electric field strength

H A very long line of a thin conducting wire produces a radial outward electric field of magnitude 2.24 kN/C at a radial distance of 45.1 cm. How much charge (in nC) is contained in a 5.52-m long length of this wire?

The electric field just above the surface of the charged drum of a photocopying machine has a magnitude E of 3.0 × 105 N/C. What is the surface charge density on the drum, assuming that the drum is a conductor? Number Units

A single isolated, large conducting plate has acharge per unit area σ on its surface. Because the plate is a conductor, the electric field at its surface is perpendicular to the surface and has magnitude E = σ/εo a.The field from a large, uniformly charged sheet with charge per unit area σ has magnitude E = σ/2εo. Why is there a difference? b.Regard the charge distribution on the conducting plate as two sheets of charge (one on each surface), each with charge per unit area σ. Find the electric field inside and outside the plate.

Problem 12:   A simple and common technique for accelerating electrons is shown in the figure, which depicts a uniform electric field between two plates. Electrons are released, usually from a hot filament, near the negative plate, and there is a small hole in the positive plate that allows the electrons to pass through. E = 2.4 × 104 N/C Calculate the horizontal component of the electron's acceleration if the field strength is 2.4 × 104 N/C. Express your answer in meters per second squared, and assume the electric field is pointing in the negative x-direction as shown in the figure.

A wire has a linear charge density (x) = 2.35x, where x is in meters (m) and is in C/m. If the length of the wire is 3.7 m, the total charge on the wire is O 16 C. 11 C. O 8.0 C. 1.2 C.

A 0.4 g object is placed in a 449 N/C uniform electric field. Upon being released from rest, it moves 62 m in 1.8 s. Determine the object's acceleration & charge magnitude. Assume the acceleration is due to the E-field (i.e., ignore all other forces). a = Q =

Two 1.9 cm-diameter disks face each other, 3.0 mm apart. They are charged to  ±14 nC. A. What is the electric field strength between the disks? B. A proton is shot from the negative disk toward the positive disk. What launch speed must the proton have to just barely reach the positive disk?