University Physics with Modern Physics (14th Edition)
14th Edition
ISBN: 9780321973610
Author: Hugh D. Young, Roger A. Freedman
Publisher: PEARSON
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Question
Chapter 29.7, Problem 29.7TYU
(a)
To determine
Which of Maxwell’s equations explains how a credit card reader works.
(b)
To determine
Which Maxwell’s equation explains how a wire carrying steady current generate a magnetic field.
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Chapter 29 Solutions
University Physics with Modern Physics (14th Edition)
Ch. 29.2 - The accompanying figure shows a wire coil being...Ch. 29.3 - (a) Suppose the magnet in Fig. 29.14a were...Ch. 29.4 - The earths magnetic field points toward (magnetic)...Ch. 29.5 - If you wiggle a magnet back and forth in your...Ch. 29.6 - Prob. 29.6TYUCh. 29.7 - Prob. 29.7TYUCh. 29 - A sheet of copper is placed between the poles of...Ch. 29 - Prob. 29.2DQCh. 29 - Prob. 29.3DQCh. 29 - Prob. 29.4DQ
Ch. 29 - A long, straight conductor passes through the...Ch. 29 - A student asserted that if a permanent magnet is...Ch. 29 - An airplane is in level flight over Antarctica,...Ch. 29 - Consider the situation in Exercise 29.21. In part...Ch. 29 - Prob. 29.9DQCh. 29 - Prob. 29.10DQCh. 29 - Example 29.6 discusses the external force that...Ch. 29 - In the situation shown in Fig. 29.18, would it be...Ch. 29 - Prob. 29.13DQCh. 29 - Small one-cylinder gasoline engines sometimes use...Ch. 29 - Does Lenzs law say that the induced current in a...Ch. 29 - Does Faradays law say that a large magnetic flux...Ch. 29 - Can one have a displacement current as well as a...Ch. 29 - Prob. 29.18DQCh. 29 - Match the mathematical statements of Maxwells...Ch. 29 - If magnetic monopoles existed, the right-hand side...Ch. 29 - Prob. 29.21DQCh. 29 - A single loop of wire with an area of 0.0900 m2 is...Ch. 29 - In a physics laboratory experiment, a coil with...Ch. 29 - Search Coils and Credit Cards. One practical way...Ch. 29 - A closely wound search coil (see Exercise 29.3)...Ch. 29 - A circular loop of wire with a radius of 12.0 cm...Ch. 29 - CALC A coil 4.00 cm in radius, containing 500...Ch. 29 - Prob. 29.7ECh. 29 - CALC A flat, circular, steel loop of radius 75 cm...Ch. 29 - Shrinking Loop. A circular loop of flexible iron...Ch. 29 - A closely wound rectangular coil of 80 turns has...Ch. 29 - CALC In a region of space, a magnetic field points...Ch. 29 - In many magnetic resonance imaging (MRI) systems,...Ch. 29 - The armature of a small generator consists of a...Ch. 29 - A flat, rectangular coil of dimensions l and w is...Ch. 29 - A circular loop of wire is in a region of...Ch. 29 - The current I in a long, straight wire is constant...Ch. 29 - Two closed loops A and C are close to a long wire...Ch. 29 - The current in Fig. E29.18 obeys the equation I(t)...Ch. 29 - Prob. 29.19ECh. 29 - A cardboard tube is wrapped with two windings of...Ch. 29 - A small, circular ring is inside a larger loop...Ch. 29 - A circular loop of wire with radius r = 0.0480 m...Ch. 29 - CALC A circular loop of wire with radius r =...Ch. 29 - A rectangular loop of wire with dimensions 1.50 cm...Ch. 29 - In Fig. E29.25 a conducting rod of length L = 30.0...Ch. 29 - A rectangle measuring 30.0 cm by 40.0 cm is...Ch. 29 - Are Motional emfs a Practical Source of...Ch. 29 - Motional emfs in Transportation. Airplanes and...Ch. 29 - The conducting rod ab shown in Fig. E29.29 makes...Ch. 29 - A 0.650-m-long metal bar is pulled to the right at...Ch. 29 - A 0.360-m-long metal bar is pulled to the left by...Ch. 29 - Prob. 29.32ECh. 29 - A 0.250-m-long bar moves on parallel rails that...Ch. 29 - Prob. 29.34ECh. 29 - Prob. 29.35ECh. 29 - A metal ring 4.50 cm in diameter is placed between...Ch. 29 - Prob. 29.37ECh. 29 - Prob. 29.38ECh. 29 - A long, thin solenoid has 400 turns per meter and...Ch. 29 - Prob. 29.40ECh. 29 - A long, straight solenoid with a cross-sectional...Ch. 29 - Prob. 29.42ECh. 29 - Prob. 29.43ECh. 29 - CALC In Fig. 29.23 the capacitor plates have area...Ch. 29 - Prob. 29.45ECh. 29 - A very long, rectangular loop of wire can slide...Ch. 29 - CP CALC In the circuit shown in Fig. P29.47, the...Ch. 29 - Prob. 29.48PCh. 29 - CALC A very long, straight solenoid with a...Ch. 29 - Prob. 29.50PCh. 29 - In Fig. P29.51 the loop is being pulled lo the...Ch. 29 - Make a Generator? You are shipwrecked on a...Ch. 29 - A flexible circular loop 6.50 cm in diameter lies...Ch. 29 - CALC A conducting rod with length L = 0.200 m,...Ch. 29 - Prob. 29.55PCh. 29 - CP CALC Terminal Speed. A bar of length L = 0.36 m...Ch. 29 - CALC The long, straight wire shown in Fig. P29.57a...Ch. 29 - CALC A circular conducting ring with radius r0 =...Ch. 29 - CALC A slender rod, 0.240 m long, rotates with an...Ch. 29 - A 25.0-cm-long metal rod lies in the .xy-plane and...Ch. 29 - CP CALC A rectangular loop with width L and a...Ch. 29 - CALC An airplane propeller of total length L...Ch. 29 - The magnetic field B, at all points within a...Ch. 29 - CP CALC A capacitor has two parallel plates with...Ch. 29 - Prob. 29.65PCh. 29 - Prob. 29.66PCh. 29 - DATA You are conducting an experiment in which a...Ch. 29 - DATA You measure the magnitude of the external...Ch. 29 - A metal bar with length L, mass m, and resistance...Ch. 29 - CP CALC A square, conducting, wire loop of side L,...Ch. 29 - BIO STIMULATING THE BRAIN. Communication in the...Ch. 29 - BIO STIMULATING THE BRAIN. Communication in the...Ch. 29 - It may be desirable to increase the maximum...Ch. 29 - Which graph in Fig. P29.74 best represents the...
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- Show that the magnetic field at a distance r from the axis of two circular parallel plates, produced by placing charge Q(t) on the plates is Bind=02rdQ(t)dtarrow_forwardIs the work required to accelerate a rod from rest to a speed v in a magnetic field greater than the final kinetic energy of the rod? Why?arrow_forwardAn electron moving with a velocity v=(4.0i+3.0j+2.0k)106m/s enters a region where there is a uniform electric field and a uniform magnetic field. The magnetic field is given by v=(1.0i2.0j+4.0k)102T. If the electron travels through a region without being deflected, what is the electric field?arrow_forward
- If the electric field of an electromagnetic wave is oscillating along the z-axis and the magnetic field is oscillating along the x-axis, in what possible direction is the wave traveling?arrow_forwardDoes increasing the magnitude of a uniform magnetic field through which a charge is traveling necessarily mean increasing the magnetic force on the charge? Does changing the direction of the field necessarily mean a change in the force on the charge?arrow_forwardCheck Your Understanding What conclusions did our analysis of Maxwell's equations lead to about these properties of a plane electromagnetic wave: (a) the relative directions of wave propagation, of the E field, and of B field, (b) the speed of travel of the wave and how the speed depends on frequency, and (c) the relative magnitudes of the E and B fields.arrow_forward
- In a region of space, a magnetic field is uniform over space but increases at a constant rate. This changing magnetic field induces an electric field that (a) increases in time, (b) is conservative, (c) is in the direction of the magnetic field, or (d) has a constant magnitude.arrow_forwardIs Ampere’s law valid for all closed paths? Why isn’t it normally useful for calculating a magnetic field?arrow_forwardA uniform electric field of magnitude 140 kV/m is directed upward in a region of space. A uniform magnetic field of magnitude 0.54 T perpendicular to the electric field also exists in this region. A beam of positively charged particles travels into the region. Determine the speed of the particles at which they will not be deflected by the crossed electric and magnetic fields. (Assume the beam of particles travels perpendicularly to both fields.) m/sarrow_forward
- A proton moving at speed v = 1.00 x 106 m/s enters a region in space where a magnetic fi eld givenby B = (–0.500 T) z exists. The velocity vector of the proton is at an angle θ = 60.0° with respect tothe positive z-axis. a) Analyze the motion of the proton and describe its trajectory (in qualitativeterms only). b) Calculate the radius, r, of the trajectory projected onto a plane perpendicular to themagnetic fi eld (in the xy-plane). c) Calculate the period, T, and frequency, f, of the motion in thatplane. d) Calculate the pitch of the motion (the distance traveled by the proton in the direction ofthe magnetic fi eld in 1 period).arrow_forwardWhen at rest, a proton experiences a net electromagnetic force of magnitude 9.0×10−13 N pointing in the positive x direction. When the proton moves with a speed of 1.6×106 m/s in the positive y direction, the net electromagnetic force on it decreases in magnitude to 7.3×10−13 N , still pointing in the positive x direction. Find the magnitude of the electric field. Find the magnitude of the magnetic field.arrow_forwardWhy is Ampere's law not consistent with the equation of continuity? How was this set right by Maxwell?arrow_forward
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