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Physics for Scientists and Engineers: A Strategic Approach with Modern Physics (4th Edition)
4th Edition
ISBN: 9780133942651
Author: Randall D. Knight (Professor Emeritus)
Publisher: PEARSON
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Textbook Question
Chapter 22, Problem 24EAP
Two positive point charges q and 4q are at x = O and x = L,
respectively, and free to move. A third charge is placed so that the
entire three-charge system is in static equilibrium. What are the
magnitude, sign, and x-coordinate of the third charge?
Expert Solution & Answer
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Students have asked these similar questions
4.) The diagram shows the electric field lines of a positively charged conducting sphere of
radius R and charge Q.
A
B
Points A and B are located on the same field line.
A proton is placed at A and released from rest. The magnitude of the work done by the electric field in
moving the proton from A to B is 1.7×10-16 J. Point A is at a distance of 5.0×10-2m from the centre of
the sphere. Point B is at a distance of 1.0×10-1 m from the centre of the sphere.
(a) Explain why the electric potential decreases from A to B. [2]
(b) Draw, on the axes, the variation of electric potential V with distance r from the centre of the
sphere.
R
[2]
(c(i)) Calculate the electric potential difference between points A and B. [1]
(c(ii)) Determine the charge Q of the sphere. [2]
(d) The concept of potential is also used in the context of gravitational fields. Suggest why scientists
developed a common terminology to describe different types of fields. [1]
3.) The graph shows how current I varies with potential difference V across a component X.
904
80-
70-
60-
50-
I/MA
40-
30-
20-
10-
0+
0
0.5
1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0
VIV
Component X and a cell of negligible internal resistance are placed in a circuit.
A variable resistor R is connected in series with component X. The ammeter reads 20mA.
4.0V
4.0V
Component X and the cell are now placed in a potential divider circuit.
(a) Outline why component X is considered non-ohmic. [1]
(b(i)) Determine the resistance of the variable resistor. [3]
(b(ii)) Calculate the power dissipated in the circuit. [1]
(c(i)) State the range of current that the ammeter can measure as the slider S of the potential divider
is moved from Q to P. [1]
(c(ii)) Describe, by reference to your answer for (c)(i), the advantage of the potential divider
arrangement over the arrangement in (b).
1.) Two long parallel current-carrying wires P and Q are separated by 0.10 m. The current in wire P is 5.0 A.
The magnetic force on a length of 0.50 m of wire P due to the current in wire Q is 2.0 × 10-s N.
(a) State and explain the magnitude of the force on a length of 0.50 m of wire Q due to the current in P. [2]
(b) Calculate the current in wire Q. [2]
(c) Another current-carrying wire R is placed parallel to wires P and Q and halfway between them as shown.
wire P
wire R
wire Q
0.05 m
0.05 m
The net magnetic force on wire Q is now zero.
(c.i) State the direction of the current in R, relative to the current in P.[1]
(c.ii) Deduce the current in R. [2]
Chapter 22 Solutions
Physics for Scientists and Engineers: A Strategic Approach with Modern Physics (4th Edition)
Ch. 22 - l. Can an insulator be charged? If so, how would...Ch. 22 - Can a conductor be charged? If so, how would you...Ch. 22 - Four lightweight balls A, B, C, and D are...Ch. 22 - Charged plastic and glass rods hang by threads. a....Ch. 22 - A lightweight metal ball hangs by a thread. When a...Ch. 22 - Prob. 6CQCh. 22 - Prob. 7CQCh. 22 - The two oppositely charged metal spheres in FIGURE...Ch. 22 - Metal sphere A in FIGURE Q22.9 has 4 units of...Ch. 22 - Prob. 10CQ
Ch. 22 - Prob. 11CQCh. 22 - Prob. 12CQCh. 22 - Reproduce FIGURE Q22.13 on your paper. Then draw a...Ch. 22 - Prob. 14CQCh. 22 - The electric force on a charged particle in an...Ch. 22 - A glass rod is charged to +8.0 nC by rubbing. a....Ch. 22 - Prob. 2EAPCh. 22 - 3. A plastic rod that has been charged to —15 nC...Ch. 22 - A glass rod that has been charged to + 12 nC...Ch. 22 - Prob. 5EAPCh. 22 - Prob. 6EAPCh. 22 - Prob. 7EAPCh. 22 - A linear accelerator uses alternating electric...Ch. 22 - Prob. 9EAPCh. 22 - Two neutral metal spheres on wood stands are...Ch. 22 - Prob. 11EAPCh. 22 - You have two neutral metal spheres on wood stands....Ch. 22 -
13. Two 1.0 kg masses are 1.0 m apart (center...Ch. 22 - Two small plastic spheres each have a mass of 2.0...Ch. 22 - Prob. 15EAPCh. 22 - Two protons are 2.0 fm apart. What is the...Ch. 22 - What is the net electric force on charge A in...Ch. 22 - What is the net electric force on charge B in...Ch. 22 - What is the force F on the 1.0 nC charge in FIGURE...Ch. 22 - What is the force on the 1.0nC charge in figure...Ch. 22 - Object A, which has been charged to +4.0 nC, is at...Ch. 22 - A small plastic bead has been charged to —15 nC....Ch. 22 - A 2.0 g plastic bead charged to —4.0 nC and a 4.0...Ch. 22 - Two positive point charges q and 4q are at x = O...Ch. 22 - A massless spring is attached to a support at one...Ch. 22 - What are the strength and direction of the...Ch. 22 - The electric field at a point in space is E =...Ch. 22 - Prob. 28EAPCh. 22 - What magnitude charge creates a 1.0 N/C electric...Ch. 22 - Prob. 30EAPCh. 22 - Prob. 31EAPCh. 22 - A + 12 nC charge is located at the origin. a. What...Ch. 22 - A —12 nC charge is located at (x, y) = (1.0 cm, 0...Ch. 22 - A 0.10 g honeybee acquires a charge of +23 pC...Ch. 22 - Prob. 35EAPCh. 22 - 36. Two 1.0 g spheres are charged equally and...Ch. 22 - 37. The nucleus of a 125Xe atom (an isotope of...Ch. 22 - Prob. 38EAPCh. 22 - Prob. 39EAPCh. 22 - Objects A and B are both positively charged. Both...Ch. 22 - What is the force F on the —10 nC charge in FIGURE...Ch. 22 - What is the force F on the —10nC charge in FIGURE...Ch. 22 - 43. What is the force on the 5.0 nC charge in...Ch. 22 - Prob. 44EAPCh. 22 - What is the force F on the 1.0 nC charge at the...Ch. 22 - What is the force F on the 1.0 nC charge at the...Ch. 22 - Prob. 47EAPCh. 22 - The net force on the 1.0 nC charge in FIGURE...Ch. 22 - Prob. 49EAPCh. 22 - A positive point charge Q is located at x=a and a...Ch. 22 - Prob. 51EAPCh. 22 - FIGURE P22.52 shows three charges and the net...Ch. 22 - Prob. 53EAPCh. 22 - Prob. 54EAPCh. 22 - You have two small, 2.0 g balls that have been...Ch. 22 - A 2.0 g metal cube and a 4.0 g metal cube are 6.0...Ch. 22 - Prob. 57EAPCh. 22 - Prob. 58EAPCh. 22 - Prob. 59EAPCh. 22 - Prob. 60EAPCh. 22 - Prob. 61EAPCh. 22 - Two 5.0 g point charges on 1.0-m-long threads...Ch. 22 - Prob. 63EAPCh. 22 - Prob. 64EAPCh. 22 - 65. A 10.0 nC charge is located at position (1.0...Ch. 22 - Prob. 66EAPCh. 22 - An electric field E = 100,000i N/C causes the 5.0...Ch. 22 - An electric field E = 200,000i N/C causes the...Ch. 22 - Prob. 69EAPCh. 22 - In Problems 69 through 72 you are given the...Ch. 22 - Prob. 71EAPCh. 22 - Prob. 72EAPCh. 22 - Prob. 73EAPCh. 22 - Three 3.0 g balls are tied to 80-cm-long threads...Ch. 22 - 75. IN ne identical small spheres shown in FIGURE...Ch. 22 - 76. The force on the -1.0 nC charge is as shown in...Ch. 22 - 77. In Section 22.3 we claimed that a charged...
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