A uniform electric field is given by Ey = -150 N/C. a. What is the potential difference between points A = (-2.0,-1.0) m and B = (-4.0, +3.0) m. [+600 V] b. What is the work done by the electric field if a point charge q = -6.0 mC is moved from point B to point A? [3.6J] c. If the potential along the line y = -1.0 m is 300 V, for which y coordinate is the potential equal to zero? [y = -3.0 m]

For a spherical surface with radius 0.33 m and is charged by 26 nC, the electric Potential V at r = 0.2 m is (in V) Select one: O a. 2149 O b. 1170 Oc. 709 O d. 0 O e. 5850

How much work does a uniform electric field of strength, 3,000 N/C, perform on a +2.0-µC point charge that moves a distance of 30 cm in the direction of the electric field?   a. 3.6 mJ   b. 1.8 mJ   c. 3.0 mJ   d. 4.2 mJ   e. 2.4 mJ

Q. When a potential difference of V is applied to the plates of a parallel-plate capacitor, the plates carry a surface charge density of 15 nC/cm2. Assuming the distance between the plates is 6µm, calculate the applied V to the plates?

Two parallel plates are held at a potential of + 200 V and + 155 V. If the plates have area of 44 cm2 and are separated by a distance of 7.3 mm, what is the magnitude of the electric field between the plates?  Select one: a. 27 b. 10000 c. 6150 d. 15000 e. 66

An electron moving parallel to the x axis has an initial speed of 3.7 x 106 m/s at the origin. Its speed is reduced to 1.4 x 105 m/s at x = 2 cm. Calculate the electric potential difference 1. between the origin and x -= 2 cm. 2. A proton is released from rest in a uniform electric field whose magnitude is 5000 V/m. Through what potential difference will it have passed after moving 0.25 meters? How fast will it be going after it has travelled 0.25 meters?

5. A 4.0-nm-diameter protein is in a 0.05 M KCl solution at 25°C. The protein has 9 positive and 20 negative charges. Model the protein as a sphere with a uniform surface charge density. What is the electric potential of the protein (a) at the surface and (b) 2.0 nm from the surface?

A 42.0-nC charge is placed at the origin and a 74.0-nC charge is placed on the +x-axis, 2.20 cm from the origin. a. What is the electric potential at a point on the +x-axis 3.40 cm from the origin? b. How much work does it take for an external agent to move a 45.0-nC charge from a point on the +x-axis, 3.40 cm from the origin to a point halfway between the 42.0-nC and 74.0-nC charges?

a. Calculate the potential at points a and b. b. Calculate the work done by the external agent to bring a point charge qfrom infinity to point b.

??