Physics for Scientists and Engineers with Modern Physics
10th Edition
ISBN: 9781337553292
Author: Raymond A. Serway, John W. Jewett
Publisher: Cengage Learning
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Question
Chapter 28, Problem 44AP
To determine
Whether the plaintiff is correct that the magnetic field of the earth is causing the buzzing of the wire or not.
Expert Solution & Answer
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R₁
5.0 22
H
4/
a
●
R3
78 92
●
£₁ = 24.0 V
V
0.10 2
£₂ = 48.0 V
0.50 Ω
E3= 6.0 V
13
+ 1₂x
i 0.05 02 h
R₂
ww
40 Ω
(a) Apply the junction rule at point a. Use the convention that current leaving a junction is
positive and current entering a junction is negative.
1₁x
Rs
-2002
✓+13 X
e
-1₁R₁+E₁-₁₁-1₁ R5+12 R₂+12₂=E₂ = 0
0.20
E = 36.0 V
The next two parts of the problem will require you to use the math type box to enter an equation for
Kirchhoff's loop rule in terms of variables only. An example problen with what the required
formatting should look like for the system to recognize it as a correct answer is provided below.
Example: Apply the loop rule to loop abcdelka, using variables instead of values. (i.e. E₁, 12, R₁,
r2 etc.). Use the Mathtype Editor (orange box).
Use subscripts using the menu in the math editor.
The answer is case sensitive (use R and r differently as appropriate).
• When forming the product IR, don't forget the multiplication sign. Enter IR as I. R.
Solution:
✓ = 0
A rail gun uses electromagnetic forces to accelerate a projectile to very high velocities. The basic mechanism of acceleration is relatively simple and can be illustrated in the following example. A metal rod of mass 40.0 g and electrical resistance 0.300 Ω rests on parallel horizontal rails that have negligible electric resistance. The rails are a distance L = 9.00 cm apart. (Figure 1)The rails are also connected to a voltage source providing a voltage of V = 5.00 V .The rod is placed in a vertical magnetic field. The rod begins to slide when the field reaches the value B = 0.131 T . Assume that the rod has a slightly flattened bottom so that it slides instead of rolling. Use 9.80 m/s^2 for the magnitude of the acceleration due to gravity.
A) Find μ_s, the coefficient of static friction between the rod and the rails. Give the answer numerically
A conducting rod is moving on the rails as shown in the figure below. Consider B = 0.776
T, 1 = 11 cm, and u = 9 m/s. It is assumed that the resistances of the rod and the rails are
negligible.
l
R=
X
c)
X
X
X
v
X
B
X
X
X
X
X
X
X
X
X
X
X
R
a)
|E|
b)
If u changes so that the power dissipated in the resistor is 0.0131 W and the
induced current is I = 0.0171 A, calculate R.
Find the magnitude of the induced emf in the circuit.
What is the direction of the induced current in the circuit?
Chapter 28 Solutions
Physics for Scientists and Engineers with Modern Physics
Ch. 28.1 - An electron moves in the plane of this paper...Ch. 28.2 - Prob. 28.2QQCh. 28.4 - A wire carries current in the plane of this paper...Ch. 28.5 - (i) Rank the magnitudes of the torques acting on...Ch. 28 - At the equator, near the surface of the Earth, the...Ch. 28 - Consider an electron near the Earths equator. In...Ch. 28 - Find the direction of the magnetic field acting on...Ch. 28 - A proton moving at 4.00 106 m/s through a...Ch. 28 - A proton travels with a speed of 5.02 106 m/s in...Ch. 28 - Prob. 6P
Ch. 28 - Prob. 7PCh. 28 - An accelerating voltage of 2.50103 V is applied to...Ch. 28 - A proton (charge + e, mass mp), a deuteron (charge...Ch. 28 - Prob. 10PCh. 28 - Review. One electron collides elastically with a...Ch. 28 - Review. One electron collides elastically with a...Ch. 28 - Review. An electron moves in a circular path...Ch. 28 - A cyclotron designed to accelerate protons has a...Ch. 28 - Prob. 15PCh. 28 - Prob. 16PCh. 28 - A cyclotron (Fig. 28.16) designed to accelerate...Ch. 28 - A particle in the cyclotron shown in Figure 28.16a...Ch. 28 - Prob. 19PCh. 28 - Prob. 20PCh. 28 - A wire carries a steady current of 2.40 A. A...Ch. 28 - Prob. 22PCh. 28 - Review. A rod of mass 0.720 kg and radius 6.00 cm...Ch. 28 - Review. A rod of mass m and radius R rests on two...Ch. 28 - Prob. 25PCh. 28 - Consider the system pictured in Figure P28.26. A...Ch. 28 - A strong magnet is placed under a horizontal...Ch. 28 - In Figure P28.28, the cube is 40.0 cm on each...Ch. 28 - Prob. 29PCh. 28 - A 50.0-turn circular coil of radius 5.00 cm can be...Ch. 28 - You are in charge of planning a physics magic show...Ch. 28 - Prob. 32PCh. 28 - A rectangular coil consists of N = 100 closely...Ch. 28 - A rectangular loop of wire has dimensions 0.500 m...Ch. 28 - Prob. 35PCh. 28 - A Hall-effect probe operates with a 120-mA...Ch. 28 - Prob. 37APCh. 28 - Prob. 38APCh. 28 - Prob. 39APCh. 28 - Prob. 40APCh. 28 - Prob. 41APCh. 28 - Prob. 42APCh. 28 - A proton having an initial velocity of 20.0iMm/s...Ch. 28 - Prob. 44APCh. 28 - Prob. 45APCh. 28 - Why is the following situation impossible? Figure...Ch. 28 - A heart surgeon monitors the flow rate of blood...Ch. 28 - Prob. 48APCh. 28 - Prob. 49CPCh. 28 - Protons having a kinetic energy of 5.00 MeV (1 eV...Ch. 28 - Review. A wire having a linear mass density of...
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