4. When an ebonite rod is rubbed with animal fur, the rod becomes negatively charges. Why? a. Positive charges are transferred from the fur to the rod b. Negative charges are transferred from the rod to the fur. c. Negative charges are created on the surface of the rod d. Negative charges are transferred from the fur to the rod. e. Positive charges are transferred from the rod to the fur. 5. A glass rod is rubbed with a cotton cloth. Which statement is true? a. The glass rod will become negatively charged b. The glass rod will become positively charged c. The cotton will have a neutral charge d. The cotton will become positive. e. Both will remain neutral 6. Compared to polyester.nylon will; a. Lose electrons more easily b. Lose electrons with more difficulty c. Lose protons more easily d. Lose protons with more difficulty e. Not enough information is given 7. Which of the following statements is true? a. Electrons are more able to move easily in a conductor. b. Electrons move more easily in an insulator c. Electrons are tightly held by a conductor d. Protons move more easily in a conductor e. Protons move more easily in an insulator 8. Which of the following is a good conductor a. Glass b. Wood c. Copper d. Fur e. Rubber

4. **d. Negative charges are transferred from the fur to the rod.** Rubbing ebonite with fur doesn't create charges; it transfers existing electrons. Ebonite has a greater affinity for electrons than fur. Therefore, electrons are transferred from the fur to the rod, leaving the rod negatively charged and the fur positively charged.<br /><br />5. **b. The glass rod will become positively charged.** Glass has a weaker hold on electrons compared to cotton. When rubbed together, electrons are transferred from the glass rod to the cotton cloth. This leaves the glass rod with a deficiency of electrons (positive charge) and the cotton cloth with an excess of electrons (negative charge).<br /><br />6. **a. Lose electrons more easily.** The triboelectric series ranks materials based on their tendency to gain or lose electrons. Nylon is higher on the series than polyester, meaning it loses electrons more readily when rubbed against polyester.<br /><br />7. **a. Electrons are more able to move easily in a conductor.** Conductors, by definition, have loosely bound electrons in their outer shells, allowing these electrons to move freely and carry electric current. Insulators, on the other hand, hold their electrons tightly. Protons, being in the nucleus, are not mobile in solids.<br /><br />8. **c. Copper.** Copper is a metal, and metals are excellent conductors of electricity due to their free electrons. Glass, wood, fur, and rubber are all insulators, meaning they resist the flow of electricity.<br />