Answer Happy

a) Two identical point charges q=6.00uC are placed at opposite corners of a square with length 3.00 cm. A point charge qo=3.00uC is brought to an empty corner, point A, from infinity. Which of the following statement(s) is/are true about the system? 1. The work done by the electric field to move qo from infinity to point A is +10.8J. II. The work done by an external force to move qo from infinity to point A is +10.8). . A. I only B. Il only C. I and 11 D. None b) Given the set of point charges each with charge +Q as shown, what is the electric potential at the origin, assuming that the potential at infinity is set to zero? A. zero B. C. + 2kQ R 4kQ R 8kQ R D. c) An infinitely long cylinder with radius R=3 cm has uniform charge density Ao = 4x10 10C/m. If the potential at the surface of the cylinder is zero, what is the potential difference between the surface of the cylinder and a point located at a distance 3 cm outside the cylinder? A. OJ/C B.-9.98 J/C C. +4.99 J/C D. +9.98 J/C