10. The figure below shows 4 different arrangements of charges labeled A to D. In each case 2 positive charges are repelling each other. The magnitudes of the charges are indicated by q or 2q. In which case is the magnitude of the force of repulsion the smallest? a) A c) C b) B d) D e) The forces are all the same 2r Я 2q ов 2r 2q 2q 2q b. 11. Charged balls are placed as shown in figures 1 and 2. The white ball is repelled by the gray and the black ball in both pictures. What can you say about the charges? Figure 2 Figure 1 a) The white ball and the black ball have opposite charges. b) The white ball and the grey ball have opposite charges. c) All the balls have same charge (negative or positive) d) One ball must be neutral. e) More information is needed to answer the question. 12. Which of the arrows best represents the direction of the net force on charge +Q due to the other two charges? 1 2 F2 /Fnet +2Q > +Q +4Q F1 a) 1 b) 2 c) 3 d) 4 e) 5 3

10. The figure below shows 4 different arrangements of charges labeled A to D. In each case 2 positive charges are repelling each other. The magnitudes of the charges are indicated by q or 2q. In which case is the magnitude of the force of repulsion the smallest? a) A c) C b) B d) D e) The forces are all the same 2r Я 2q ов 2r 2q 2q 2q b. 11. Charged balls are placed as shown in figures 1 and 2. The white ball is repelled by the gray and the black ball in both pictures. What can you say about the charges? Figure 2 Figure 1 a) The white ball and the black ball have opposite charges. b) The white ball and the grey ball have opposite charges. c) All the balls have same charge (negative or positive) d) One ball must be neutral. e) More information is needed to answer the question. 12. Which of the arrows best represents the direction of the net force on charge +Q due to the other two charges? 1 2 F2 /Fnet +2Q > +Q +4Q F1 a) 1 b) 2 c) 3 d) 4 e) 5 3

College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter1: Units, Trigonometry. And Vectors

Section: Chapter Questions

Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...

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Concept explainers

Proper Length

The theory of special relativity explains the connection between space and time to objects that move in a straight line at a constant speed. The objects move at the speed of light. When an object approaches light speed, its mass is endless and cannot move faster than light. The most crucial postulate of Einstein's special relativity is that the laws of nature do not change in each frame of reference.

Question

#12 with explanation

10. The figure below shows 4 different arrangements of charges labeled A to D. In each case 2
positive charges are repelling each other. The magnitudes of the charges are indicated by q or
2q. In which case is the magnitude of the force of repulsion the smallest?
a) A
c) C
b) B
d) D
e) The forces are all the same
2r
Я
2q
ов
2r
2q
2q
2q
b.
11. Charged balls are placed as shown in figures 1 and 2. The white ball is repelled by the gray
and the black ball in both pictures. What can you say about the charges?
Figure 2
Figure 1
a) The white ball and the black ball have opposite charges.
b) The white ball and the grey ball have opposite charges.
c) All the balls have same charge (negative or positive)
d) One ball must be neutral.
e) More information is needed to answer the question.
12. Which of the arrows best represents the direction of the net force on charge +Q due to the
other two charges?
1 2
F2
/Fnet
+2Q > +Q
+4Q
F1
a) 1
b) 2
c) 3
d) 4
e) 5
3

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