The electron in a hydrogen atom orbits the proton at a radius of 0.053 nm. What is the electric field due to the proton at the position of the electron?

Three 8.0 μC charges are at the three corners of an square of side 0.40 m. The last corner is occupied by a -8.0 μC charge. Find the electric field (in N/C) at the center of the square.

What is the magnitude of the electric field at a point that is a distance of 3.0 cm from the center of a uniform, solid ball of charge, 5.0 µC, and radius, 8.0 cm?     3.8 x 106 N/C     5.3 x 106 N/C     6.8 x 106 N/C     2.6 x 106 N/C     9.8 x 106 N/C

Problem 13:   An electron has an initial velocity of 5.15 × 106 m/s in a uniform 1.9 × 105 N/C electric field. The field accelerates the electron in the direction opposite to its initial velocity. Part A: How far does the electron travel before coming to rest in m?  Part B: How long does it take the electron to come to rest in s?  Part C: What is the magnitude of the electron's velocity (in m/s) when it returns to its starting point in the opposite direction of its initial velocity?

A +7 nC charge is located 3.2 meters to the right of a +6 nC charge. Determine the magnitude of the electric field at the midpoint of the two charges. Express your answer as a positive number in N/C.

A horizontal electron beam consists of electrons moving at 2000 m/s through two parallel, horizontal plates that are 0.01 m long and generate a uniform and constant 0.5 N/C electric field that points upward.  What is the vertical component of the electron's velocity upon exiting the field in m/s? Assume the plate separation is sufficient that you do not need to worry about the electrons hitting the plate.

Singly-ionized helium contains two protons and one electron (there are also neutrons, but they have net zero charge and are not pertinent to this problem). Suppose the electron is located a distance of 2.65 × 10^-11 m from the nucleus. Place the nucleus at the origin of your coordinate system and the electron on the positive-x axis. What is the position on the x-axis at which the electric field is zero?

The classic Millikan oil drop experiment was the first to obtain an accurate measurement of the charge on an electron. In it, oil drops were suspended against gravity by a vertical electric field. microscope Assume the oil drop to be 1.90 µm in radius and have a density of 922 kg/m3. (a) Find the weight of the drop. N (b) If the drop has a single excess electron, find the magnitude of the electric field strength needed to balance its weight. N/C

An alpha particle (a helium nucleus) is traveling along the positive x-axis at 1200 m/s when it enters a cylindrical tube of radius 0.400 cm centered on the x-axis. Inside the tube is a uniform electric field of 5.50  10-4 N/C pointing in the negative y-direction. How far does the particle travel before hitting the tube wall? Neglect any gravitational forces. Note: m? = 6.64  10-27 kg; q? = 2e. m

A proton is projected horizontally midway between two parallel plates that are separated by 0.47 cm. The uniform electric field has magnitude 6.0 × 105 N/C between the plates. If the plates are 5.6 cm long, find the minimum speed of the proton if it just misses the lower plate as it emerges from the field. The gravitational force on the proton can be neglected. O 6.2 x 106 m/s 12 x 106 m/s 11 x 106 m/s 7.4 x 106 m/s 8.7 x 106 m/s Tw E