PHYSICS F./SCI... W/MOD V.II W/KIT
4th Edition
ISBN: 9780134819884
Author: GIANCOLI
Publisher: PEARSON
expand_more
expand_more
format_list_bulleted
Concept explainers
Question
Chapter 29, Problem 8Q
To determine
The direction of current in the Figure 29-12a if the rod moves left.
Expert Solution & Answer
Want to see the full answer?
Check out a sample textbook solutionStudents have asked these similar questions
Consider a coil of wire wrapped around an iron core. If the flux in the core is given by the
equation o = 0.5sinwtWb and if there are 200 turns on the core, what voltage is produced
at the terminals of the coil?
Please help with 32
31 The commutator of a 1.5 hp, 2-pole, 3000
r/min de motor has a diameter of 63 mm.
Calculate the peripheral speed in feet per
minute and in miles per hour.
32 The following information is given on the
brushes used in the motor of Problem 31:
number of brushes: 2
current per brush: 15 A
brush dimensions: 5/8 in wide, 5/16 in thick,
3/4 in long. (The 5/16 in × 5/8 in area is in
contact with the commutator.)
resistivity of brush: 0.0016 Q
brush pressure: 1.5 Ibf
brush contact drop: 1.2 V
coefficient of friction: 0.2
Calculate the following:
a. The resistance of the brush body in ohms
b. The voltage drop in the brush body
c. The total voltage drop in one brush, including
the contact voltage drop
d. The total electrical power loss (in watts) due to
the two brushes
e. The frictional force of one brush rubbing
against the commutator surface (in Ibf and in
newtons)
f. The frictional energy expended by the two
brushes when the commutator makes one
revolution (in joules)
g.…
what will happen if two circular conducting loop is placed into another circular conducting loop assuming that it has same size and boundaries are aligned and they carryy equal currents but opposite direction.
Chapter 29 Solutions
PHYSICS F./SCI... W/MOD V.II W/KIT
Ch. 29.1 - Return to the Chapter-Opening Question, page 758,...Ch. 29.2 - Prob. 1BECh. 29.3 - In what direction will the electrons now in Fig....Ch. 29.5 - A bicycle headlight is powered by a generator that...Ch. 29.7 - Prob. 1EECh. 29 - Prob. 1QCh. 29 - What is the difference between magnetic flux and...Ch. 29 - Suppose you are holding a circular ring of wire...Ch. 29 - Prob. 4QCh. 29 - Is there a force between the two loops discussed...
Ch. 29 - Suppose you are looking along a line through the...Ch. 29 - The battery mentioned in Question 6 is...Ch. 29 - Prob. 8QCh. 29 - Prob. 9QCh. 29 - In situations where a small signal must travel...Ch. 29 - What is the advantage of placing the two insulated...Ch. 29 - Prob. 12QCh. 29 - A region where no magnetic field is desired is...Ch. 29 - A cell phone charger contains a transformer. Why...Ch. 29 - An enclosed transformer has four wire leads coming...Ch. 29 - The use of higher-voltage lines in homessay, 600 V...Ch. 29 - Prob. 17QCh. 29 - Prob. 18QCh. 29 - Prob. 19QCh. 29 - Will an eddy current brake (Fig. 2921) work on a...Ch. 29 - It has been proposed that eddy currents be used to...Ch. 29 - The pivoted metal bar with slots in Fig. 2935...Ch. 29 - If an aluminum sheet is held between the poles of...Ch. 29 - A bar magnet falling inside a vertical metal tube...Ch. 29 - A metal bar, pivoted at one end, oscillates freely...Ch. 29 - Since a magnetic microphone is basically like a...Ch. 29 - Prob. 1PCh. 29 - (I) The north pole of the magnet in Fig. 2936 is...Ch. 29 - Prob. 3PCh. 29 - (I) A 22.0-cm-diameter loop of wire is initially...Ch. 29 - Prob. 5PCh. 29 - (II) A 10.8-cm-diameter wire coil is initially...Ch. 29 - (II) A 16-cm-diameter circular loop of wire is...Ch. 29 - (II) (a) If the resistance of the resistor in Fig....Ch. 29 - Prob. 9PCh. 29 - (II) The magnetic field perpendicular to a...Ch. 29 - (II) A circular loop in the plane of the paper...Ch. 29 - (II) Part of a single rectangular loop of wire...Ch. 29 - (II) While demonstrating Faradays law to her...Ch. 29 - Prob. 14PCh. 29 - (II) A 22.0-cm-diameter coil consists of 28 turns...Ch. 29 - (II) A power line carrying a sinusoidally varying...Ch. 29 - (II) The magnetic field perpendicular to a single...Ch. 29 - Prob. 18PCh. 29 - (II) A 25-cm-diameter circular loop of wire has a...Ch. 29 - (II) The area of an elastic circular loop...Ch. 29 - Prob. 21PCh. 29 - Prob. 22PCh. 29 - Prob. 23PCh. 29 - (II) Inductive battery chargers, which allow...Ch. 29 - Prob. 25PCh. 29 - Prob. 26PCh. 29 - (I) The moving rod in Fig. 2912b is 13.2 cm long...Ch. 29 - (I) The moving rod in Fig. 2912b is 12.0 cm long...Ch. 29 - Prob. 29PCh. 29 - (II) If the U-shaped conductor in Fig. 2912a has...Ch. 29 - (II) Suppose that the U-shaped conductor and...Ch. 29 - (II) When a car drives through the Earths magnetic...Ch. 29 - Prob. 33PCh. 29 - Prob. 34PCh. 29 - (III) A short section of wire, of length a, is...Ch. 29 - (I) The generator of a car idling at 875-rpm...Ch. 29 - Prob. 37PCh. 29 - (II) A simple generator has a 480-loop square coil...Ch. 29 - (II) Show that the rms output of an ac generator...Ch. 29 - (II) A 250-loop circular armature coil with a...Ch. 29 - Prob. 41PCh. 29 - (I) A motor has an armature resistance of 3.05 ....Ch. 29 - (II) What will be the current in the motor of...Ch. 29 - (II) The back emf in a motor is 85 V when the...Ch. 29 - Prob. 45PCh. 29 - (I) A transformer has 620 turns in the primary...Ch. 29 - (I) Neon signs require 12 kV for their operation....Ch. 29 - (II) A model-train transformer plugs into 120-V ac...Ch. 29 - (II) The output voltage of a 75-W transformer is...Ch. 29 - (II) If 65 MW of power at 45 kV (rms) arrives at a...Ch. 29 - Prob. 51PCh. 29 - (III) Design a dc transmission line that can...Ch. 29 - (III) Suppose 85 kW is to be transmitted over two...Ch. 29 - Prob. 54PCh. 29 - (II) The betatron, a device used to accelerate...Ch. 29 - (III) Show that the electrons in a betatron,...Ch. 29 - (III) Find a formula for the net electric field in...Ch. 29 - Prob. 58GPCh. 29 - A square loop 27.0 cm on a side has a resistance...Ch. 29 - Power is generated at 24 kV at a generating plant...Ch. 29 - Prob. 61GPCh. 29 - Prob. 62GPCh. 29 - A pair of power transmission lines each have a...Ch. 29 - Show that the power loss in transmission lines,...Ch. 29 - A high-intensity desk lamp is rated at 35 W but...Ch. 29 - Prob. 66GPCh. 29 - A coil with 150 turns, a radius of 5.0 cm, and a...Ch. 29 - A search coil for measuring B (also called a flip...Ch. 29 - A ring with a radius of 3.0 cm and a resistance of...Ch. 29 - A flashlight can be made that is powered by the...Ch. 29 - A small electric car overcomes a 250-N friction...Ch. 29 - What is the energy dissipated as a function of...Ch. 29 - A thin metal rod of length rotates with angular...Ch. 29 - The magnetic field of a shunt-wound dc motor is...Ch. 29 - Prob. 75GPCh. 29 - A circular metal disk of radius R rotates with...Ch. 29 - What is the magnitude and direction of the...Ch. 29 - Prob. 78GPCh. 29 - Prob. 79GPCh. 29 - Prob. 80GP
Knowledge Booster
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, physics and related others by exploring similar questions and additional content below.Similar questions
- The coil whose lengthwise cross section is shown in the accompanying figure carries a currents I and has N evenly spaced turns distributed along the length I. Evaluate BdI for the paths indicated.arrow_forwardHow does the self- inductance per unit length near the center of a solenoid (away from the ends) compare with its value near the end of the solenoid?arrow_forward51 : A T.G. has 500 turns, each of radius 2n cm. If BH = 3.6 x 10-5 Wb/m?, find its reduction factor. Find the deflection due to a 12 mA currents.arrow_forward
- (a) Two long parallel wires, each 2.0 mm in diameter and 9.00 cm apart, carry equal 1.0-A currents in the same direc- tion, Fig. 20-75. Determine B along the x axis between the wires as a function of x. (b) Graph B vs. x from x = 1.0 mm to x = 89.0 mm. y -d = 9.00 cm – I FIGURE 20–75arrow_forward(II) A rectangular loop of wire is placed next to a straight wire, as shown in Fig. 20-55. There is a current of 3.5 A in both wires. Deter- 3.5 A mine the magnitude and direction of the net force on the loop. 3.5 A 3.0 cm 5.0 cm FIGURE 20-55 Problem 31. 10.0 cm-arrow_forwardSuspending Suspending a wire with a current. A horizontal wire carries a current I1 = 80 A dc. A second parallel wire 20 cm below it (Fig. 28-7) must carry how much current I2 so that it doesn't fall due to gravity? The lower wire has a mass of 0.12 g per meter of length.arrow_forward
- 7) 210/31|1 y 6L →x d 2lo/3 A long wire carries a furrent 10/in the shown direction. A second wire of length 61 carrying a current Vin the direction as seen in the figure is placed at a di stan ce along y axis. The distance of the closest end of this wire from the first wire is d. What is the torque on the wire of length Sicalculated according to the axis defined by the long wire? 6L A) – (k) B)– (k) C) (k) D) 64oL (k) E) (Ê)arrow_forwardThe figure shows three currents of the same absolute value (two parallel and one antiparallel) and four amperian ones. Place the amperianas in the decreasing order of the absolute value of ∮ Bxdsarrow_forwardA wire loop is located in a uniform magnetic field. If current is sent through the wire, what happens? O a torque will act on the loop O the loop will contract the loop will heat up the loop will expandarrow_forward
- A long straight wire carries a current I as shown in Fig. 21-55. A small loop of wire rests in the plane of the page. Which of the following will not induce a current in the loop? (a) Increasing the current in the straight wire. (b) Moving the loop in a direction parallel to the wire. (c) Rotating the loop so that it becomes perpendicular to the plane of the page. (d) Moving the loop farther from the wire without rotating it. (e) Moving the loop farther from the wire while rotating it. FIGURE 21-55 MisConceptual Question 7.arrow_forwardwhat will be the value of I, just after the switch is closed 2Ω S 12V 7nF HEarrow_forwardCalculate the instantaneous voltage at given time 't'.arrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
- Principles of Physics: A Calculus-Based TextPhysicsISBN:9781133104261Author:Raymond A. Serway, John W. JewettPublisher:Cengage LearningPhysics for Scientists and Engineers with Modern ...PhysicsISBN:9781337553292Author:Raymond A. Serway, John W. JewettPublisher:Cengage Learning
- Physics for Scientists and EngineersPhysicsISBN:9781337553278Author:Raymond A. Serway, John W. JewettPublisher:Cengage Learning
Principles of Physics: A Calculus-Based Text
Physics
ISBN:9781133104261
Author:Raymond A. Serway, John W. Jewett
Publisher:Cengage Learning
Physics for Scientists and Engineers with Modern ...
Physics
ISBN:9781337553292
Author:Raymond A. Serway, John W. Jewett
Publisher:Cengage Learning
Physics for Scientists and Engineers
Physics
ISBN:9781337553278
Author:Raymond A. Serway, John W. Jewett
Publisher:Cengage Learning