Physics Questions & Answers

Physics Questions & Answers A +15-nC point charge is placed on the x axis at x = 1.5 m, and a -20-nC charge is placed on the y axis at y = -2.0m. What is the magnitude of the electric field at the origin? - CORRECT ANSWER- 75 A +2.0-nC point charge is placed at one corner of a square (1.5 m on a side), and a -3.0-nC charge is placed on a corner diagonally away from the first charge. What is the magnitude of the electric field at either of the two unoccupied corners? - CORRECT ANSWER- 14 A +20-nC point charge is placed on the x axis at x = 2.0 m, and a -25-nC point charge is placed on the y axis at y = -3.0 m. What is the direction of the electric field at the origin? - CORRECT ANSWER- 35 A 12-nC charge is distributed uniformly along the y axis from y = 0 to y = 4 m. Which of the following integrals is correct for the x component of the electric field at x = 2 m on the x axis? - CORRECT ANSWER- 54 dy A 16-nC charge is distributed uniformly along the x axis from x = 0 to x = 4 m. Which of the following integrals is correct for the magnitude (in N/C) of the electric field at x = +10 m on the x axis? - CORRECT ANSWER- (36/10-x) A 24-nC charge is distributed uniformly along the x axis from x = 2 m to x = 6 m. Which of the following integrals is correct for the magnitude (in N/C) of the electric field at x = +8 m on the x axis? - CORRECT ANSWER- 54dx/8-x A 40-μC charge is positioned on the x axis at x = 4.0 cm. To produce a net electric field of zero at the origin where should a -60-μC charge be placed? - CORRECT ANSWER- 4.9