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QUIZ 15 Chapter 22 |
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| 1.What force binds atoms together to form molecules ? |
| a. gravitational |
| b. nuclear |
| c. magical |
| d. nota |
| 2. When I rubbed an inflated balloon in my hair, I gave an example of charging by |
| a. contact |
| b. friction |
| c. induction |
| d. nota |
| 3. After rubbing it in my hair, I placed the inflated balloon of the previous problem against the classroom wall and it stuck . Why did the balloon stick to the wall? |
| a. The negatively charged balloon polarized atoms in the wall and created a positively charged surface on the wall that attracted the balloon. |
| b. The positively charged balloon polarized atoms in the wall and created a negatively charged surface on the wall that attracted the balloon. |
| c. nota |
| 4. Electrical forces are similar to gravitational forces because electrical forces |
| a. attract or repel |
| b. obey the inverse square law |
| c. nota |
| 5. The magnitude of the electric force between two charges depends only on the |
| a. the product of the masses of the two charges |
| b. the product of the two charges |
| c. the product of the two charges and the separation distance |
| d. the separation distance and the product of the masses of the two charges |
| e. nota |
| 6. An electron and a neutron |
| a. attract each other |
| b. repel each other |
| c. neither attract or repel each other |
| 7.Two charges separated by 3 meters attract each other with a 1-N force on each other. The two charges |
| a. are of the same sign |
| b. are of opposite signs |
| c.nota |
| 8. In the the previous problem, if the magnitude of each charge is tripled, then the force on each charge will be |
| a. 3 N |
| b. 9 N |
| c. 1 N |
| d. 8 N |
| e. nota |
| 9. In problem 7, if the two charges are pulled to a separation distance of 6 meters, the force of attraction on each other will be |
| a. 1-N |
| b. 1/2 N |
| c. 1/4 N |
| d. 2 N |
| e. nota |
| 10. Suppose that the strength of the electric field at a certain distance from an isolated point charge has a value of 2 N/C . If the distance is doubled, then the electric field will have the value |
| a. 4 N/C |
| b. 1 N/C |
| c. 1/2 N/C |
| d. nota |
| 11. Suppose you place a free proton in an electric field that points vertically down. The electric force on the proton will point |
| a. up |
| b. down |
| 12. Suppose you place a free electron in an electric field that points vertically up. The electric force on the electron will point |
| a. up |
| b. down |
| 13. Suppose you expend 20 Joules of work to push a 4-coulomb positive test charge in a direction opposite (against) an electric field. What is the gain in potential energy of the test charge? |
| a. 80 Joules |
| b. 20 Joules |
| c. 5 Joules |
| 14. In the previous problem, what is the change in potential between the test charge's initial location and the test charge's final location? |
| a. 80 Volts |
| b. 16 Volts |
| c. 5 Volts |
| d. nota |
| 15. The net charge of a fully charged capacitor is |
| a. positive |
| b. negative |
| c. zero |
| 16. The net charge of a fully discharged capacitor is |
| a. positive |
| b. negative |
| c. zero |
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17. True or False. The energy stored in a capacitor is stored in the
electric field between the plates. a. True |
| b. False |