13. 14. 15. 16. 17. 18. A uniform linear charge density of 7.0 nC/m is distributed along the y axis from y = 2 m to y= 5 m. Which of the following integrals is correct for the magnitude (in WC) of the electric field at y = 0 on the y axis? I5 630'}: 5 Zldy I5 63d); a. 2 y; b. 2 y; C. 2 (5-y)2 5 Zldy d. L (5 _y); 9. none ofthese A closed surface contains the following point charges: 6 C, 4 C, - 2 C, - 4 C. The electric flux coming out of the surface is: a. 16 Cleo. b. - 16 Cleo. c. 4 Cleo- d. - 4 Ciao. A spherical volume of space has an electric field of intensity 100 NC directed radially outward from its surface of radius 0.600 m. What is the net charge enclosed within this surface? a. 6.8 nC. b. 4.0 nC. c. - 6.8 of). d. - 4.0 nC. A point charge 0 = 5.00 HC is located at the center of a cube of edge L = 0.10 m. In addition. six other identical point charges having q = - 1.00 uC are positioned symmetrically around Q. Determine the electric flux through one face of the cube. a. - 18.8 kN/m2 b. - 113 kN/m2 c. - 678 I-tN/m2 d. - 565 kN/m2 Charges q and Q are placed on the x axis at x = 0 and x = 2.0 m, respectively. If g = 40 pC and Q = +30 pC, determine the net ux through a spherical surface (radius = 1.0 m) centered on the origin. a. 9.6 N - m2/C b. 6.8 N - m2/C c. 8.5 N - m2/C d. 4.5 N - mZIC e. 1.1 N - m2/C A point charge +Q is located on the x axis at x = a, and a second point charge Q is located on the x axis at x = a. A Gaussian surface with radius r: 2a is centered at the origin. The flux through this Gaussian surface is a. zero because the negative flux over one hemisphere is equal to the positive flux over the other. b. greater than zero. c. zero because at every point on the surface the electric field has no component perpendicular to the surface. d. zero because the electric field is zero at every point on the surface. 9. none of the above. 19. The xy plane is "painted" with a uniform surface charge density which is equal to 40 nC/m. Consider a spherical surface with a 4.0-cm radius that has a point in the xy plane as its center. What is the electric flux through that part of the spherical surface for which z > 0? a. 14 N . m2/C b. 11 N . m2/C C. 17 N . m2/C d. 20 N . m2/C e. 23 N . m2/C 20. A charge of uniform volume density (40 nC/m) fills a cube with 8.0-cm edges. What is the total electric flux through the surface of this cube? a. 2.9 N .m2/C b. 2.0 N . m2/C C. 2.6 N . m2/C d. 2.3 N . m/C e. 1.8 N . m /C 21. A hemispherical surface (half of a spherical surface) of radius R is located in a uniform electric field of magnitude E that is parallel to the axis of the hemisphere. What is the magnitude of the electric flux through the hemisphere surface? a. TRZE b. 4TER2E/ 3 C. 2 TRZE/ 3 d. TRZE/ 2 e. TRZE/3 22. Charge of uniform surface density (0.20 nC/m-) is distributed over the entire xy plane. Determine the magnitude of the electric field at any point having z = 2.0 m. a. 17 N/C b. 11 N/C C. 23 N/C d. 28 N/C e. 40 N/C 23. Two infinite parallel surfaces carry uniform charge densities of 0.20 nC/m2 and - 0.60 nC/m2. What is the magnitude of the electric field at a point between the two surfaces? a. 34 N/C b. 23 N/C C. 45 N/C d. 17 N/C e. 90 N/C 24. Two infinite, uniformly charged, flat surfaces are mutually perpendicular. One of the sheets has a charge density of +60 pC/m, and the other carries a charge density of -80 pC/m. What is the magnitude of the electric field at any point not on either surface? a. 1.1 N/C b. 5.6 N/C C . 7.9 N/C d. 3.8 N/C e . 4.0 N/C 25. A long nonconducting cylinder (radius = 12 cm) has a charge of uniform density (5.0 nC/my) distributed throughout its volume. Determine the magnitude of the electric field 15 cm from the axis of the cylinder. a. 20 N/C b. 27 N/C C. 16 N/C 12 N/C e. 54 N/C