Practice_Test_2

# Practice_Test_2 - Practice Test 2 1. The charge on an...

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Practice Test 2 1. The charge on an electron is –1.602 x 10 -19 C. What is the amount of negative charge in one mole of copper? a. -2.8 x 10 6 C b. 2.8 x 10 6 C c. 1.4 x 10 6 C d. –1.4 x 10 6 C 2. If an object is charged positively, a. it contains only positive charges b. it contains only negative charges c. it contains more positive charges than negative charges d. it contains more negative charges than positive charges 3. A and B are two small light spheres that can be charged electrically. Which of the following statements is true about these two spheres? a. In order that A and B attract each other, A must have an excessive positive charge and B must have an excessive negative charge. b. In order that A and B attract each other, A must have an excessive negative charge and B must have an excessive positive charge. c. In order that A and B attract each other, at least one of them must have an excess charge d. A and B will always attract each other electrically 4. What is the electrostatic force between the electron and the proton if they are 2.5 x 10 -9 m away from each other? a. 4.1 x 10 -11 N b. 6.8 x 10 -12 N b. 4.1 x 10 -12 N d. 6.8 x 10 -11 N 5. Two positive charges are separated by a distance r and the force of separation between them is F. What is the force of repulsion between them if the distance is increased to 1.8r? a. 2F b. F c. 0.5F d. 0.3F 6. A charge q 1 = 2 nC is at the origin, a charge q 2 = 3 nC is at x = 1.5 and a charge q 3 = 3 is at x = -1.5. What is the force on q 1 due to the other two charges? a. 3.0 x 10 -8 N i b. –3.0 x 10 -8 N i c. 6.0 x 10 -9 N d. 0 7. In question 6, what is the force on q 2 due to the other two charges?

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a. 3.0 x 10 -8 N i b. –3.0 x 10 -8 N i c. 6.0 x 10 -9 N d. 0 8. In question 6, what is the force on q 3 due to the other two charges? a. 3.0 x 10 -8 N i b. –3.0 x 10 -8 N i c. 6.0 x 10 -9 N d. 0 9. Which of the following will happen if a positively charged conductor is brought near an insulated neutral conductor? a. The neutral conductor will acquire a net negative charge b. The neutral conductor will acquire a net positive charge c. Polarization of charges will occur in the neutral conductor d. The positive charges in the neutral conductor will flow to the earth 10. The direction of an electric field is a. the direction of motion of a positive charge b. the direction of motion of a negative charge c. perpendicular to the direction of motion of a positive charge d. perpendicular to the direction of motion of a negative charge 11. What is the direction of motion of an electron in an electric field directed east? a.
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## This note was uploaded on 05/01/2011 for the course PHY 2049 taught by Professor George during the Spring '11 term at Edison State College.

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Practice_Test_2 - Practice Test 2 1. The charge on an...

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