College Physics For Ap® Courses
16th Edition
ISBN: 9781938168932
Author: Gregg Wolfe, Irina Lyublinskaya, Douglas Ingram
Publisher: OpenStax
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Textbook Question
Chapter 18, Problem 29CQ
If qa = 0 in Figure 18-46, under what conditions will there be no net Coulomb force on q?
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A particle with charge -6 µC is located on
the x-axis at the point 4 cm, and a second
particle with charge 6 µC is placed on the
x-axis at 6 cm.
6 8 10
(cm)
-10 -8 –6 –4 –2
2
4
What is the magnitude of the total elec-
trostatic force on a third particle with charge
7 µC placed on the x-axis at -2 cm? The
Coulomb constant is 8.9875 x 10º N · m2/C².
Answer in units of N.
O 6 µC
1) Consider three charged point
particles distributed along the x-axis
as follows: Q1=+32 µC at x = 0,
Q2=+20 uC at x = 0.4m, and Q3=-60
µC at x = 0.6m, Determine the value
of the Coulomb force on Q1:
k=9x10^9 S.I*
O 84 N
O 12 N
O 36 N
O 50 N
O 48 N
Consider the figure below.
(b) o
0.
-20
-20
+10+
+34
10
10
cm
2+1
+9
x (cm)
x (cm)
a. Find the total Coulomb force on a charge of 4.9 C located at x3,7 cm in part (b) of the figure,
given that q-1.9 µC (indicate the direction with the sign of your answer.)
0.904
b. Find the x-position (between x-0 cm and x 14 cm) at which the electric field is zero in part (b) of
the figure.
Chapter 18 Solutions
College Physics For Ap® Courses
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Find the total Coulomb force on a charge q in...Ch. 18 - Find the electric field at the location of qain...Ch. 18 - (a) Find the electric field at the center of the...Ch. 18 - (a) What is the electric field 5.00 m from the...Ch. 18 - (a) What is the direction and magnitude of an...Ch. 18 - A simple and common technique for accelerating...Ch. 18 - Earth has a net charge that produces an electric...Ch. 18 - Point charges of 25.0 C and 45.0 (2 are placed...Ch. 18 - What can you say about two charges q1and q2, if...Ch. 18 - Integrated Concepts Calculate the angular velocity...Ch. 18 - Integrated Concepts An electron has an initial...Ch. 18 - Integrated Concepts The practical limit to an...Ch. 18 - Integrated Concepts A 5.00 g charged insulating...Ch. 18 - Integrated Concepts Figure 18.57 shows an electron...Ch. 18 - Integrated Concepts The classic Millikan oil drop...Ch. 18 - Integrated Concepts (a) In Figure 18.59, four...Ch. 18 - Unreasonable Results 64. 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- (a) What is the direction of the total Coulomb force on q in Figure 18.46 if q is negative, qa= qcand both are negative, and qb= qcand both are positive? (b) What is the direction of the electric field at the center of the square in this situation?arrow_forward(a) Find the total Coulomb force on a charge of 2.00 nC located at x = 4.00 cm in Figure 18.52 (b): given that q = 1,00C . (b) Find the x-position at which the electric field is zero in Figure 18.52 (b).arrow_forwardIn what way or ways would the physical universe be different if protons were negatively charged and electrons were positively charged? Gravity would be a repulsive force instead of an attractive one. Since protons are more massive, the universe would acquire a net negative charge. The value of the Coulomb constant k would change. Like charges would attract, and opposite charges would repel. Atoms would consist of protons orbiting a nucleus composed of electrons and neutrons. There would be no difference other than the sign on the charged particles.arrow_forward
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- Two point charges of mass m each are suspended in the gravitational field of the Earth by two non-conducting massless strings, each of length 1, attached to the same fixed point. The spheres are given equal charges Q of the same sign. As a result each string makes angle a to the vertical (see figure below). Calculate m, if 1 = 76.4 cm, Q = 4 μC and α = л/6. Take Coulomb constant ke =8.99×10° N m² C-2. Give your answer in grams. Answer: d D M M Q 60 garrow_forwardQuestion 21: Calculate the ratio of the Coulomb force to the gravitational force, Fc/F,, between two protons separeted by a distance d. Does the ratio change if the distance d changes from 10-10 m to 100 km?arrow_forwardonly 7 and 8arrow_forward
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