6. A positively charged electroscope has a) fewer electrons than protons. b) more electrons than protons. c) no electrons. d) the same number of protons and electrons. e) no protons 7. Two equally charged balls repel each other. Which change will increase the force between them the most? a) Decrease the distance between the balls by a factor of 2 b) Increase the distance between the balls by a factor of 5 c) Increase the charge on each ball by factor of 2 d) Increase the charge on one of the balls by factor of 5 e) Decrease the charge on one of the balls by a factor of 5 8. An oil drop has a charge of -1.12x10-18 Coulomb. How many excess electrons does the oil drop have? c) 5 a) 1 b) 3 d) 7 e) 2 9. The diagram shows an electric field around three charged spheres. Which statement describes the charges on the spheres?

College Physics
11th Edition
ISBN:9781305952300
Author:Raymond A. Serway, Chris Vuille
Publisher:Raymond A. Serway, Chris Vuille
Chapter15: Electric Forces And Fields
Section: Chapter Questions
Problem 42P: In the Millikan oil-drop experiment illustrated in Figure 15.21, an atomizer (a sprayer with a fine...
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6. A positively charged electroscope has
a) fewer electrons than protons.
b) more electrons than protons.
c) no electrons.
d) the same number of protons and electrons.
e) no protons
7. Two equally charged balls repel each other. Which change will increase the force between
them the most?
a) Decrease the distance between the balls by a factor of 2
b) Increase the distance between the balls by a factor of 5
c) Increase the charge on each ball by factor of 2
d) Increase the charge on one of the balls by factor of 5
e) Decrease the charge on one of the balls by a factor of 5
8. An oil drop has a charge of -1.12x10-18 Coulomb. How many excess electrons does the oil drop
have?
c) 5
a) 1
b) 3
d) 7
e) 2
9. The diagram shows an electric field around three charged spheres. Which statement
describes the charges on the spheres?
Transcribed Image Text:6. A positively charged electroscope has a) fewer electrons than protons. b) more electrons than protons. c) no electrons. d) the same number of protons and electrons. e) no protons 7. Two equally charged balls repel each other. Which change will increase the force between them the most? a) Decrease the distance between the balls by a factor of 2 b) Increase the distance between the balls by a factor of 5 c) Increase the charge on each ball by factor of 2 d) Increase the charge on one of the balls by factor of 5 e) Decrease the charge on one of the balls by a factor of 5 8. An oil drop has a charge of -1.12x10-18 Coulomb. How many excess electrons does the oil drop have? c) 5 a) 1 b) 3 d) 7 e) 2 9. The diagram shows an electric field around three charged spheres. Which statement describes the charges on the spheres?
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