A PVC rod is rubbed with fur. During the process 5 x 1010 electrons are transferred from the fur to the rod. What is the net charge of the fur? A. +8.0 nC В. -8.0 nC С. +50 nC D. -50 nC

After a glass rod is rubbed with silk, it is observed to have a net charge of +24 nC. Which of the following statements correctly describes the interaction between the silk and the rod? A. The rod transferred 1.5 x1011 electrons to the silk. B. The rod transferred 1.5 x1011 protons to the silk. C. The silk transferred 1.5 x1011 electrons to the rod. D. The silk transferred 1.5 x1011 protons to the rod.

15. An alpha particle has a charge of +2e, where e is the elementary charge (e = 1.6 x 10-¹⁹C). The alpha particle travels at high speed and approaches a gold nucleus, which has a charge of +79e. What is the electric force acting on the alpha particle when it is 2.0 x 10-¹4 m from the gold nucleus? A. 5.7 kN B. 1.8 fN C. 1.8 pN D. 1.8 N E. 91 N

G5

A charged 3.60 g glass bead hangs suspended in the air by an electric field. If the bead was charged by the removal of 7.10×1010 electrons, what must the electric field magnitude be?  2.56×1011 N/C 3.11×106 N/C 4.97×10-13 N/C 3.17×108 N/C

An oil drop with a mass of 5.74 x 10-16 kg is suspended between two horizontal parallel plates. The magnitude of the electric field between the plates is 35.00 x 10° N/C. The magnitude of the charge on the drop is A. 8.00 × 10-16 C B. 1.13 × 10-18 C C. 1.60 × 10-19 C D. 1.15 × 10-19 c

Four charges ?, −? ?, and −?, are located at equally spaced intervals on the ? axis. Their? values are −3?, −?, ?, and 3?, respectively.a. Derive an expression for the total electric field for points along the ?-axis.b. Prove that the electrostatic field is zero on the ?-axis at the point? = ?√((9 − 3^(2/3)) / (3^(2/3) − 1)) ≈ (2.53)?