Shown below there are three charges sitting at the corners of an equilateral triangle. The charges and distances are shown in the figure. What is the total electrical potential energy charge C has due to Charges A and B? Qс 3D +2.72 тс d d = 1.32 x 10-2m d Qa = +3.87 mC Ов 3—4.56 тC %3D

A parallel-plate capacitor in air has a plate separation of 1.42 cm and a plate area of 25.0 cm2. The plates are charged to a potential difference of 265 V and disconnected from the source. The capacitor is then immersed in distilled water. Assume the liquid is an insulator. (a) Determine the charge on the plates before and after immersion. before pC after pC (b) Determine the capacitance and potential difference after immersion. Cf = F ΔVf = V (c) Determine the change in energy of the capacitor.nJ

A proton (mass = 1.67 10 ka. charge 1.60 10-19 C) moves from point A to point B under the influence of an electrostatic force only. At point A the proton moves with a speed of 50 km/s. At point B the speed of the proton is 93.8 km/s. Determine the potential difterence V-V (in units of volts). Select one: OA. 24.68 OB.-32.87 OC. 32.24 OD. -51.77 OE. 2.12

What potential difference is needed to stop a proton that has an initial velocity v = 6.0 * 105 m?s?

A E The potential is highest at point E. What direction does the electric field at C point? O East North O South OWest E

A 0.5050.505 cm diameter plastic sphere, used in a static electricity demonstration, has a uniformly distributed 34.034.0 nC charge on its surface. What is the potential near its surface?

An air-filled capacitor consists of two parallel plates, each with an area of 7.60 cm2, separated by a distance of 1.40 mm. A 25.0-V potential difference is applied to these plates. (a) Calculate the electric field between the plates. kV/m (b) Calculate the surface charge density. nC/m2 (c) Calculate the capacitance. pF (d) Calculate the charge on each plate. pC

In (Figure 1), the charge q = 3.97 x 10-⁹ C. Figure -1.00 m -29 0 X +5q O 1.00 m 1 of 1 Part A Find the value of x between -1.00 m and 0 where the electric potential is zero. Express your answer to three significant figures and include appropriate units. Value Submit Part B HÅ O Greater than zero Submit O Less than zero O Equal to zero Part C At values of a to the left of -1.00 m, do you expect the electric potential to be greater than, less than, or equal to zero? Request Answer Submit Value Provide Feedback Units Request Answer Calculate the electric potential at x = -2.00 m. Express your answer to three significant figures and include appropriate units. μA B ? Units Request Answer ?

A 12.6-kV potential difference is applied across parallel conducting plates with an area of 0.631 m². The air between the plates will break down and begin to conduct if the electric field exceeeds about 3 x 106 V/m. (a) How close together can you put the plates and have them hold a charge? dmin mm (b) What will the capacitance of the plates be at this distance? Cmax = nF (c) How much charge can the plates hold before the air begins to break down? Qmax = | μC

A point charge of 4.15x10^-6C and mass 75.6x10^-8 kg is in a uniform electric field of 477 N/C i. Released from rest, the charge is  accelerated by the field, obtaining a velocity of 86.6 m/s I. What electric potential difference did the charge move through?