2122_HRW_0506

# 2122_HRW_0506 - AP Physics Chapter 21 and 22 Review Sheet...

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AP Physics Chapter 21 and 22 Review Sheet 1. A coulomb is the same as: A) an ampere/second B) half an ampere second 2 C) an ampere/meter 2 D) an ampere second E) a newton meter 2 2. The magnitude of the charge on an electron is approximately: A) 10 23 C B) 10 –23 C C) 10 19 C D) 10 –19 C E) 10 9 C 3. The magnitude of the total negative charge on the electrons in 1 kg of helium (atomic number 2, atomic mass 4) is: A) 48 C B) 2.4 × 10 7 C C) 4.8 × 10 7 C D) 9.6 × 10 8 C E) 1.9 × 10 8 C 4. A wire contains a steady current of 2 A. The number of electrons that pass a cross section in 2 s is: A) 2 B) 4 C) 6.3 × 10 18 D) 1.3 × 10 19 E) 2.5 × 10 19

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5. To make an uncharged object have a negative charge we must: A) add some atoms B) remove some atoms C) add some electrons D) remove some electrons E) write down a negative sign 6. When a hard rubber rod is given a negative charge by rubbing it with wool: A) positive charges are transferred from rod to wool B) negative charges are transferred from rod to wool C) positive charges are transferred from wool to rod D) negative charges are transferred from wool to rod E) negative charges are created and stored on the rod 7. A conductor is distinguished from an insulator with the same number of atoms by the number of: A) nearly free atoms B) electrons C) nearly free electrons D) protons E) molecules
8. The diagram shows a pair of heavily charged plastic cubes that attract each other. Cube 3 is a conductor and is uncharged. Which of the following illustrates the forces between cubes1 and 3 and between cubes 2 and 3? A) I B) II C) III D) IV E) V 9. A positively charged insulating rod is brought close to an object that is suspended by a string. If the object is attracted toward the rod we can conclude: A) the object is positively charged B) the object is negatively charged C) the object is an insulator D) the object is a conductor E) none of the above Page 3

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10. Two uncharged metal spheres, L and M, are in contact. A negatively charged rod is brought close to L, but not touching it, as shown. The two spheres are slightly separated and the rod is then withdrawn. As a result: A) both spheres are neutral B) both spheres are positive C) both spheres are negative D) L is negative and M is positive E) L is positive and M is negative 11. The leaves of a positively charged electroscope diverge more when an object is brought near the knob of the electroscope. The object must be: A) a conductor B) an insulator C) positively charged D) negatively charged E) uncharged 12. An electroscope is charged by induction using a glass rod that has been made positive by rubbing it with silk. The electroscope leaves: A) gain electrons B) gain protons C) lose electrons D) lose protons E) gain an equal number of protons and electrons
13. A charged insulator can be discharged by passing it just above a flame. This is because the flame: A) warms it B) dries it C) contains carbon dioxide D) contains ions E) contains more rapidly moving atoms

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## This note was uploaded on 02/26/2012 for the course PHYSICS 302K taught by Professor Irenepolycarpou during the Spring '09 term at University of Texas at Austin.

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2122_HRW_0506 - AP Physics Chapter 21 and 22 Review Sheet...

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