22. Two uniformly charged pellets A and B are held some dis- tance from each other, and then the charge on A is doubled. Which of the following statements is most correct? (a) The magnitude of the electric force exerted on A is doubled because the electrie field al the position of A is doubled. (b) The magnitude of the electric force exerted on A is dou- bled because the electric field at the position of B is doubled. (c) The magnitude of the electric force exerted on B is dou- bled because the electric field at the position of B is doubled, •

College Physics
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Author:Raymond A. Serway, Chris Vuille
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Chapter1: Units, Trigonometry. And Vectors
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Number 22
Figure P23.20
b.
3m
3m
m
21. Suppose two plates lie in parallel horizontal plancs, one plate
In the xy plane at z 0 and the other plate in the plane that
is parallel to the xy plane at z = 10 mm. Between the plates is
a constant clectric field directed vertically upward (that is, in
the positive z direction). A proton and an electron are launched
In the positive x direction with the same initial velocity from
position (0, 0, 5.0 mm). If the proton strikes a plate at (200 mm,
0, 10 mm), where does the electron strike?
+4
om
nd
4).
he
23.5 Electric field of a charged particle
22. Two uniformly charged pellets A and B are held some dis-
tance from each other, and then the charge on A is doubled.
Which of the following statements is most correct? (a) The
magnitude of the electric force exerted on A is doubled
because the electric field at the position of A is doubled.
(b) The magnitude of the eleetric force exerted on A is dou-
bled because the electric field at the position of B is doubled.
(() The magnittude of the electric force exerted on B is dou-
bled because the electric field at the position of B is doubled.
23. What is the magnittude of the electric field 200 mm away
from a particle carrying 3.0 pC of charge?
OUESTIONS AND PROBLEMS
425
Cartesta
rons than
The drop Chage necessary to restult in a ceflet of 1mm
t acceptable lognore thedlectsof grvity n this cneer
Transcribed Image Text:Figure P23.20 b. 3m 3m m 21. Suppose two plates lie in parallel horizontal plancs, one plate In the xy plane at z 0 and the other plate in the plane that is parallel to the xy plane at z = 10 mm. Between the plates is a constant clectric field directed vertically upward (that is, in the positive z direction). A proton and an electron are launched In the positive x direction with the same initial velocity from position (0, 0, 5.0 mm). If the proton strikes a plate at (200 mm, 0, 10 mm), where does the electron strike? +4 om nd 4). he 23.5 Electric field of a charged particle 22. Two uniformly charged pellets A and B are held some dis- tance from each other, and then the charge on A is doubled. Which of the following statements is most correct? (a) The magnitude of the electric force exerted on A is doubled because the electric field at the position of A is doubled. (b) The magnitude of the eleetric force exerted on A is dou- bled because the electric field at the position of B is doubled. (() The magnittude of the electric force exerted on B is dou- bled because the electric field at the position of B is doubled. 23. What is the magnittude of the electric field 200 mm away from a particle carrying 3.0 pC of charge? OUESTIONS AND PROBLEMS 425 Cartesta rons than The drop Chage necessary to restult in a ceflet of 1mm t acceptable lognore thedlectsof grvity n this cneer
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