Conceptual Physics / MasteringPhysics (Book & Access Card)
12th Edition
ISBN: 9780321908605
Author: Paul G. Hewitt
Publisher: PEARSON
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Chapter 22, Problem 14RCQ
To determine
The manner a semiconductor differs from a conductor or an insulator.
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Kirchoff's Laws. A circuit contains 3 known resistors, 2 known batteries, and 3 unknown currents as shown.
Assume the current flows through the circuit as shown (this is our initial guess, the actual currents may be
reverse). Use the sign convention that a potential drop is negative and a potential gain is positive.
E₂ = 8V
R₁₁ = 50
R₂ = 80
b
с
w
11
www
12
13
E₁ = 6V
R3 = 20
a) Apply Kirchoff's Loop Rule around loop abefa in the clockwise direction starting at point a. (2 pt).
b) Apply Kirchoff's Loop Rule around loop bcdeb in the clockwise direction starting at point b. (2 pt).
c) Apply Kirchoff's Junction Rule at junction b (1 pt).
d) Solve the above 3 equations for the unknown currents I1, 12, and 13 and specify the direction of the current
around each loop. (5 pts)
I1 =
A
12 =
A
13 =
A
Direction of current around loop abef
Direction of current around loop bcde
(CW or CCW)
(CW or CCW)
No chatgpt pls will upvote
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]
Chapter 22 Solutions
Conceptual Physics / MasteringPhysics (Book & Access Card)
Ch. 22 - Prob. 1RCQCh. 22 - Prob. 2RCQCh. 22 - Prob. 3RCQCh. 22 - Prob. 4RCQCh. 22 - Prob. 5RCQCh. 22 - Prob. 6RCQCh. 22 - Prob. 7RCQCh. 22 - Prob. 8RCQCh. 22 - Prob. 9RCQCh. 22 - Prob. 10RCQ
Ch. 22 - Prob. 11RCQCh. 22 - Prob. 12RCQCh. 22 - Prob. 13RCQCh. 22 - Prob. 14RCQCh. 22 - Prob. 15RCQCh. 22 - Prob. 16RCQCh. 22 - Prob. 17RCQCh. 22 - Prob. 18RCQCh. 22 - Prob. 19RCQCh. 22 - Prob. 20RCQCh. 22 - Prob. 21RCQCh. 22 - Prob. 22RCQCh. 22 - Prob. 23RCQCh. 22 - Prob. 24RCQCh. 22 - Prob. 25RCQCh. 22 - Prob. 26RCQCh. 22 - Prob. 27RCQCh. 22 - Prob. 28RCQCh. 22 - Prob. 29RCQCh. 22 - Prob. 30RCQCh. 22 - Prob. 31RCQCh. 22 - 32. Write a letter to Grandpa and tell him why...Ch. 22 - Prob. 33RCQCh. 22 - Coulomb’s...Ch. 22 - 35. Solve for the force in the preceding problem...Ch. 22 - 36. Two point charges are seperated by 6 cm. The...Ch. 22 - Prob. 37RCQCh. 22 - 38. Two pellets, each with a charge of 1...Ch. 22 - 39. Electronic types neglect the force of gravity...Ch. 22 - 40. Atomic physicists ignore the effect of gravity...Ch. 22 - Prob. 41RCQCh. 22 - The potential difference between a storm cloud and...Ch. 22 - Prob. 43RCQCh. 22 - 44. Find the voltage change when (a) an electric...Ch. 22 - 45. In 1909 Robert Millikan was the first to find...Ch. 22 - 46. The three pairs of metal same-size spheres...Ch. 22 - 47. Shown are three separate pairs of point...Ch. 22 - Prob. 48RCQCh. 22 - Prob. 49RCQCh. 22 - Why aren’t objects with vast numbers of electrons...Ch. 22 - Prob. 51RCQCh. 22 - Prob. 52RCQCh. 22 - Prob. 53RCQCh. 22 - 54. At some automobile toll booths a thin metal...Ch. 22 - 55. Why are the tires for trucks carrying gasoline...Ch. 22 - 56. An electroscope is a simple device consisting...Ch. 22 - Prob. 57RCQCh. 22 - Is it necessary for a charged body actually to...Ch. 22 - Prob. 59RCQCh. 22 - 60. How can you charge an object negatively with...Ch. 22 - Prob. 61RCQCh. 22 - Prob. 62RCQCh. 22 - 63. The 50,000 billion billion () freely moving...Ch. 22 - Prob. 64RCQCh. 22 - Prob. 65RCQCh. 22 - 66. When you double the distance between a pair of...Ch. 22 - Prob. 67RCQCh. 22 - 68. When you double the charge on both particles...Ch. 22 - Prob. 69RCQCh. 22 - 70. How do electric field lines indicate the...Ch. 22 - Prob. 71RCQCh. 22 - 72. Suppose that the strength of the electric...Ch. 22 - Prob. 73RCQCh. 22 - 74. Measurements show that there is an electrical...Ch. 22 - Prob. 75RCQCh. 22 - Prob. 76RCQCh. 22 - Prob. 77RCQCh. 22 - Prob. 78RCQCh. 22 - Prob. 79RCQCh. 22 - 80. How can a charged atom (an ion) attract a...Ch. 22 - 81. If you place a free electron and a free proton...Ch. 22 - 82. How will the accelerations of the proton and...Ch. 22 - 83. How will the directions of travel compare for...Ch. 22 - Prob. 84RCQCh. 22 - Prob. 85RCQCh. 22 - Prob. 86RCQCh. 22 - Prob. 87RCQCh. 22 - Prob. 88RCQCh. 22 - 89. If you expend 10 J of work to push a 1-C...Ch. 22 - 90. When released what is the kinetic energy of...Ch. 22 - Prob. 91RCQCh. 22 - 92. Why is it safe to remain inside a car during a...Ch. 22 - Prob. 93RCQCh. 22 - 94. In order to store more energy in a...Ch. 22 - Prob. 95RCQCh. 22 - 96. An electron volt (eV) is a unit of energy....Ch. 22 - Prob. 97RCQCh. 22 - Would you feel any electrical effects if you were...Ch. 22 - Prob. 99RCQCh. 22 - Prob. 100RCQCh. 22 - Prob. 101RCQCh. 22 - 102. Strictly speaking when an object acquires a...Ch. 22 - Strictly speaking, will a penny be slightly more...Ch. 22 - Prob. 104RCQCh. 22 - Prob. 105RCQCh. 22 - If you are caught outdoors in a thunderstorm, why...Ch. 22 - 107. Two pieces of plastic, a full ring and a half...Ch. 22 - Prob. 108RCQ
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