This preview shows pages 1–3. Sign up to view the full content.
This preview has intentionally blurred sections. Sign up to view the full version.
View Full Document
Unformatted text preview: huang (jwh2377) Homework 2 lang (58650) 1 This printout should have 55 questions. Multiplechoice questions may continue on the next column or page find all choices before answering. 001 10.0 points Calculate the net charge on a substance con sisting of a combination of 3 . 8 10 13 protons and 5 . 10 13 electrons. Answer in units of C. 002 10.0 points You have 2 . 2 kg of water. One mole of water has a mass of 18 g / mol and each molecule of water contains 10 electrons since water is H 2 O. What is the total electron charge contained in this volume of water? Answer in units of C. 003 10.0 points A particle with charge 2 C is located on the xaxis at the point 8 cm , and a second particle with charge 6 C is placed on the xaxis at 10 cm . The Coulomb constant is 8 . 9875 10 9 N m 2 / C 2 . 2 4 6 8 10 2 4 6 8 10 2 C 6 C 8 C x (cm) What is the magnitude of the total elec trostatic force on a third particle with charge 8 C placed on the xaxis at 2 cm ? Answer in units of N. 004 10.0 points Two charges q 1 and q 2 are separated by a distance d and exert a force F on each other. What is the new force F , if charge 1 is increased to q 1 = 5 q 1 , charge 2 is decreased to q 2 = q 2 / 2, and the distance is decreased to d = d/ 2? Choose one 1. F = 10 F 2. F = 50 F 3. F = 5 / 2 F 4. F = 25 F 5. F = 25 / 2 F 6. F = 5 F 7. F = 100 F 8. F = 20 F 9. F = 25 / 4 F 10. F = 5 / 4 F 005 (part 1 of 5) 10.0 points Two charges q 1 and q 2 are separated by a distance d and exert a force F on each other. What new force F would exist if q 1 is tripled? 1. F = 0 2. F = 1 3 F 3. F = 1 9 F 4. F = 9 F 5. F = 3 F 6. None of these 006 (part 2 of 5) 10.0 points What new force F would exist if q 1 and q 2 are cut in half? 1. F = 0 2. F = 1 2 F 3. F = 4 F 4. F = 2 F 5. None of these. huang (jwh2377) Homework 2 lang (58650) 2 6. F = 1 4 F 007 (part 3 of 5) 10.0 points What new force F would exist if d is doubled? 1. F = 4 F 2. F = 1 4 F 3. F = 1 2 F 4. None of these 5. F = 0 6. F = 2 F 008 (part 4 of 5) 10.0 points What new force F would exist if d is cut in half? 1. F = 1 4 F 2. None of these. 3. F = 1 2 F 4. F = 4 F 5. F = 2 F 6. F = 0 009 (part 5 of 5) 10.0 points What new force F would exist if q 1 is doubled and d is quadrupled? 1. F = 16 256 F 2. F = 256 4 F 3. F = 256 16 F 4. F = 16 2 F 5. F = 4 256 F 6. F = 0 7. F = 2 16 F 8. None of these. 010 10.0 points Two electrons in an atom are separated by 1 . 6 10 10 m, the typical size of an atom....
View
Full
Document
This note was uploaded on 02/18/2010 for the course PHYS 317L taught by Professor Lang during the Spring '10 term at University of Texas at Austin.
 Spring '10
 LANG
 Charge, Work

Click to edit the document details