Conceptual Physics / MasteringPhysics (Book & Access Card)
12th Edition
ISBN: 9780321908605
Author: Paul G. Hewitt
Publisher: PEARSON
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Chapter 24, Problem 17RCQ
Why are the magnetic fields of superconducting magnets often stronger than those of conventional magnets?
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TRUE OR FALSE
A superconducting metal can allow an external magnetic field to penetrate the surface over a given distance.
Use the following constants if necessary. Coulomb constant, k = 8.987 x 10° N - m² /C2. Vacuum permitivity, eo = 8.854 × 10-12 F/m. Magnetic
Permeability of vacuum, 4o = 12.566370614356 x 10-7 H/m. Magnitude of the Charge of one electron, e =-1.60217662 x 10-19 C. Mass of one
electron, m, = 9.10938356 x 10-31 kg. Unless specified otherwise, each symbol carries their usual meaning. For example, µC means micro coulomb
A solid non conducting sphere of radius R = 15 m with uniform charge density p = 50 µC/m3
a)
Charge enclosed inside 7.5 m radius
Give your answer up to at least three significance digits.
C
Electric field at a distance 7.5 m
Give your answer up to at least three significance digits.
N/C
b)
Charge inclosed inside 30 m radius
Give your answer up to at least three significance digits.
Electric field at a distance 30 m
Give your answer up to at least three significance digits.
N/C
Which of the following statements are true about permanent magnetic materials, like iron?
O magnetic materials always produce a dipole field around them
O magnetic materials have unpaired valence electrons
O permanent magnets have large-scale alignment of magnetic domains
O magnetic materials can be temporarily magnetized by an external magnetic field
O all metals are magnetic materials
all conductors are also magnetic materials
O magnetic materials have completely filled valence orbitals
O permanent magnets have many distinct domains that point in different directions
Chapter 24 Solutions
Conceptual Physics / MasteringPhysics (Book & Access Card)
Ch. 24 - Prob. 1RCQCh. 24 - Prob. 2RCQCh. 24 - Prob. 3RCQCh. 24 - Prob. 4RCQCh. 24 - Prob. 5RCQCh. 24 - How does magnetic field strength relate to the...Ch. 24 - Prob. 7RCQCh. 24 - Prob. 8RCQCh. 24 - Prob. 9RCQCh. 24 - Prob. 10RCQ
Ch. 24 - Prob. 11RCQCh. 24 - Prob. 12RCQCh. 24 - Prob. 13RCQCh. 24 - Prob. 14RCQCh. 24 - Prob. 15RCQCh. 24 - Prob. 16RCQCh. 24 - Why are the magnetic fields of superconducting...Ch. 24 - Prob. 18RCQCh. 24 - Prob. 19RCQCh. 24 - Prob. 20RCQCh. 24 - What relative direction between a magnetic field...Ch. 24 - Prob. 22RCQCh. 24 - Prob. 23RCQCh. 24 - Prob. 24RCQCh. 24 - Prob. 25RCQCh. 24 - Prob. 26RCQCh. 24 - Prob. 27RCQCh. 24 - Prob. 28RCQCh. 24 - Prob. 29RCQCh. 24 - Prob. 30RCQCh. 24 - Prob. 31RCQCh. 24 - Prob. 32RCQCh. 24 - Prob. 33RCQCh. 24 - Prob. 34RCQCh. 24 - Prob. 35RCQCh. 24 - 36. To make compass, point an ordinary iron nail...Ch. 24 - If you place a chunk of iron near the north pole...Ch. 24 - Prob. 38RCQCh. 24 - Prob. 39RCQCh. 24 - 40. What kind of force field surrounds a...Ch. 24 - Prob. 41RCQCh. 24 - 42. A friend tells you that a refrigerator door,...Ch. 24 - Prob. 43RCQCh. 24 - Prob. 44RCQCh. 24 - Prob. 45RCQCh. 24 - 46. One way to compass is to stick magnetized...Ch. 24 - Prob. 47RCQCh. 24 - 48. The north pole of a compass is attracted to...Ch. 24 - Prob. 49RCQCh. 24 - 50. In what position can a current-carrying loop...Ch. 24 - Prob. 51RCQCh. 24 - 52. In Figure 24.15 we see a magnet exerting a...Ch. 24 - Prob. 53RCQCh. 24 - A straight current-carrying wire is horizontal and...Ch. 24 - Prob. 55RCQCh. 24 - Prob. 56RCQCh. 24 - Prob. 57RCQCh. 24 - A beam of electrons passes through a magnetic...Ch. 24 - Prob. 59RCQCh. 24 - 60. A proton moves in a circular path...Ch. 24 - Prob. 61RCQCh. 24 - Prob. 62RCQCh. 24 - Prob. 63RCQCh. 24 - 64. Residents of northern Canada are bombarded by...Ch. 24 - Prob. 65RCQCh. 24 - Prob. 66RCQCh. 24 - Prob. 67RCQCh. 24 - One way to shield a habitat in outer space from...Ch. 24 - Prob. 69RCQCh. 24 - Prob. 70RCQCh. 24 - Prob. 71RCQCh. 24 - 72. What is the magnetic effect of placing two...Ch. 24 - Prob. 73RCQCh. 24 - Prob. 74RCQCh. 24 - Prob. 75RCQCh. 24 - Prob. 76RCQCh. 24 - Prob. 77RCQCh. 24 - Prob. 78RCQCh. 24 - 79. A cyclotron is a device for accelerating...Ch. 24 - 80.A magnet can exert a force on a moving charged...Ch. 24 - Prob. 81RCQCh. 24 - 82. When a current is passed through a helically...
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- Review. A fundamental property of a type 1 superconducting material is perfect diamagnetism, or demonstration of the Meissner effect, illustrated in Figure 29.27 in Section 29.6 and described as follows. If a sample of superconducting material is placed into an externally produced magnetic field or is cooled to become superconducting while it is in a magnetic field, electric currents appear on the surface of the sample. The currents have precisely the strength and orientation required to make the total magnetic field be zero throughout the interior of the sample. This problem will help you understand the magnetic force that can then act on the sample. Compare this problem with Problem 39 in Chapter 25, pertaining to the force attracting a perfect dielectric into a strong electric field. A vertical solenoid with a length of 120 cm and a diameter of 2.50 cm consists of 1 400 turns of copper wire carrying a counterclockwise current (when viewed from above) of 2.00 A as shown in Figure P31.48a. (a) Find the magnetic field in the vacuum inside the solenoid. (b) Find the energy density of the magnetic field. Now a superconducting bar 2.20 cm in diameter is inserted partway into the solenoid. Its upper end is far outside the solenoid, where the magnetic field is negligible. The lower end of the bar is deep inside the solenoid. (c) Explain how you identify the direction required for the current on the curved surface of the bar so that the total magnetic field is zero within the bar. The field created by the supercurrents is sketched in Figure P31.48b, and the total field is sketched in Figure P31.48c. (d) The field of the solenoid exerts a force on the current in the superconductor. Explain how you determine the direction of the force on the bar. (e) Noting that the units J/m3 of energy density are the as the units N/m2 of pressure, calculate the magnitude of the force by multiplying the energy density of the solenoid field times the area of the bottom end of the superconducting bar. Figure P31.48arrow_forwardThe density of charge carriers far copper is 8.471028 electrons per cubic meter. What will be the Hall voltage reading from a probe made up of 3cm2cm1cm ( (LWT) ) copper plate when a current of 1.5 A is passed through it in a magnetic field of 2.5 T perpendicular to the 3cm2cm .arrow_forwardThe Hall effect is to be used to find the density of charge carriers in an unknown material. A Hall voltage 40 V for 3-A current is observed in a 3-T magnetic field far a rectangular sample with length 2 cm, width 1.5 cm, and height 0.4 cm, Determine the density of the charge carriers.arrow_forward
- Use the following constants if necessary. Coulomb constant, k = 8.987 × 10° N · m² /C2. Vacuum permitivity, eo = 8.854 × 10-12 F/m. Magnetic Permeability of vacuum, µo = 12.566370614356 × 10-7 H/m. Magnitude of the Charge of one electron, e = -1.60217662 × 10-19 C. Mass of one electron, me = 9.10938356 × 10-31 kg. Unless specified otherwise, each symbol carries their usual meaning. For example, µC means micro coulomb You have an infinite wire with linear charge density A = 8 C/m. The wire is placed along z-axis. Find the magnitude of Electric Field at a distance 13 cm perpendicular away from the wire. Magnitude of Electric Field Give your answer up to at least three significance digits. N/Carrow_forwardUse the following constants if necessary. Coulomb constant, k = 8.987 × 10° N · m²/C². Vacuum permitivity, eo = 8.854 × 10-12 F/m. Magnetic Permeability of vacuum, Ho = 12.566370614356 ×x 10-7 H/m. Magnitude of the Charge of one electron, e = -1.60217662 × 10-19 C. Mass of one electron, me = 9.10938356 × 1031 kg. Unless specified otherwise, each symbol carries their usual meaning. For example, µC means micro coulomb Lorentz Force is given by F = qE + qv, × B 4 = ((0) î + (0) ĵ + (5) k) × 10® m/8 and B = ((-5) î + (5) ĵ + (7) k) Tesla, Given to vector, If the charge is given by q=11NC and E = 0 Then, Find the Force F. x component Give your answer up to at least three significance digits. y component Give your answer up to at least three significance digits. N z component Give your answer up to at least three significance digits. Narrow_forwardUse the following constants if necessary. Coulomb constant, k = 8.987 × 10° N · m²/C². Vacuum permitivity, eo = 8.854 × 10-12 F/m. Magnetic Permeability of vacuum, Ho = 12.566370614356 ×x 10-7 H/m. Magnitude of the Charge of one electron, e = -1.60217662 × 10-19 C. Mass of one electron, me = 9.10938356 × 10-31 kg. Unless specified otherwise, each symbol carries their usual meaning. For example, µC means micro coulomb An object is placed in a stationary S frame and length of that object measured by observer in S' frame is L = 120 m. What is the actual length of that object. The S' frame is going with the a relative speed v = 0.4c with S frame. Actual Leangth Give your answer up to at least three significance digits. marrow_forward
- Use the following constants if necessary. Coulomb constant, k = 8.987 × 10º N · m²/C². Vacuum permitivity, eo = 8.854 × 10-12 F/m. Magnetic Permeability of vacuum, Ho = 12.566370614356 ×x 10-7 H/m. Magnitude of the Charge of one electron, e = -1.60217662 × 10-19 C. Mass of one electron, me = 9.10938356 x 10-31 kg. Unless specified otherwise, each symbol carries their usual meaning. For example, µC means micro coulomb Imagine you have a circular loop of wire placed in the x-y plane. The current I = 9 A is flowing along counter – clockwise through the loop if we look from above the xy plane. Calculate the magnetic dipole moment. Assume that the radius of the loop is R = 17 cm. magnetic dipole moment Give your answer up to at least three significance digits. A · m?arrow_forwardUse the following constants if necessary. Coulomb constant, k = 8.987 × 10° N · m²/C². Vacuum permitivity, €o = 8.854 × 10-12 F/m. Magnetic Permeability of vacuum, Ho = 12.566370614356 ×x 10-7 H/m. Magnitude of the Charge of one electron, e = -1.60217662 × 10-19 C. Mass of one electron, me = 9.10938356 × 10-31 kg. Unless specified otherwise, each symbol carries their usual meaning. For example, µC means micro coulomb Given that, there is two current carrying wire. One is carrying I = 7 mA current in the -1j direction and the other wire is also carrying I, = 6 mA current in the -lj direction. The seperation between the two parallel wires is d= 11 cm. If we consider a Length L = 20 m then what is the Magnitude of the Force acting on the wire segment. Use + sign for attractive force and – for repulsive. Force acting on the wire is? Give your answer up to at least three significance digits. Narrow_forwardUse the following constants if necessary. Coulomb constant, k=8.987×109N⋅m2/C2. Vacuum permitivity, ϵ0=8.854×10−12F/m. Magnetic Permeability of vacuum, μ0=12.566370614356×10−7H/m. Magnitude of the Charge of one electron, e=−1.60217662×10−19C. Mass of one electron, me=9.10938356×10−31kg. Unless specified otherwise, each symbol carries their usual meaning. For example, μC means microcoulomb . You have an infinite wire with linear charge density λ=5C/m. The wire is placed along z-axis. Find the magnitude of Electric Field at a distance 21cm perpendicular away from the wire. Magnitude of Electric Fieldarrow_forward
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