Introductory Physics-11 2K, Spring 2017 PHYS- Date: Nore: Do problems ome throug

Question

Introductory Physics-11 2K, Spring 2017 PHYS- Date: Nore: Do problems ome through five, and one ofthe last moproblems, six or seven For full credit you showld show all the steps of your ansaers Chapter 18 Electric Forces and Electric Fields an equal number electrons. If the One mole a 6.02 x and of individual of substance contains 10 in very small, protons could somehow be separated from the electrons and pl be the magnitude separated by two million meters (2 x what would electron electrostatic force ex by one box on the other?Che electric charge of a proton and an are both of magnitude l 1.6 x 10-19Co A) 9.72 x 10 N B) 8.53 x 10 N C) 5.24 x 10 N D) 3.46 x 10 N E 2.09 x 10 N 2. A uniform horizontal electric field exist everywhere in the x, y plane. This electric field has a magnitude of E 4700 Vlm and is directed in the positive x direction. A point charge at 7.0 x 10 at the origin. Find the magnitude of the net electric field Cis placed (a) point A, 0.15 m. (b) point B,x 0.15 m, and (c) point C, y +0.15 m. Epoint, Eat

Explanation / Answer

1) electrostatic force exerted by one box on another = [8.98 * 109 * (6.02 * 1023 * 1.6 * 10-19)2]/(2 * 106)2

                                                                               = 2.09 * 107 N

2) a) net electric field = 8.98 * 109 * 7 * 10-9/0.152 + 4700

                                    = 7493.77 V/m

    b) net electric field = - 8.98 * 109 * 7 * 10-9/0.152 + 4700

                                    = 1906.22 V/m

   c)    net electric field = sqrt(47002 + 2793.772)

                                    =   5467.649 V/m

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