Physics
Physics
5th Edition
ISBN: 9781260486919
Author: GIAMBATTISTA
Publisher: MCG
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Chapter 19, Problem 121P

(a)

To determine

The drift velocity of electrons.

(a)

Expert Solution
Check Mark

Answer to Problem 121P

Drift velocity is 1.1mm/s.

Explanation of Solution

Concentration of free electrons is 5.85×1028m3, thickness of silver strip is 0.050mm, width of strip is 20.0mm, magnetic field is 0.80T, and current is 10.0A.

Write the equation for drift velocity.

vd=Ine(dw)

Here, vd is the drift velocity, I is the current, n is the electron density, e is the charge of electron, d is the thickness of strip, and w is the width of strip.

Conclusion:

Substitute 10.0A for I, 5.85×1028m3 for n, 1.6×1019C for e, 0.050mm for d, and 20.0mm for w in the above equation to find vd.

vd=10.0A(5.85×1028m3)(1.6×1019C)((0.050mm(103m1mm))(20.0mm(103m1mm)))=10.07.692×103mm=0.0013m(103mm1m)=1.3mm

Therefore, the drift velocity is 1.1mm/s.

(b)

To determine

The hall voltage measured by the meter.

(b)

Expert Solution
Check Mark

Answer to Problem 121P

Hall voltage is 17μV.

Explanation of Solution

Concentration of free electrons is 5.85×1028m3, thickness of silver strip is 0.050mm, width of strip is 20.0mm, magnetic field is 0.80T, and current is 10.0A.

Write the relation between electric force and magnetic force on electron at equilibrium.

FE=FB . (I)

Here, FE is the electric force and FB is the magnetic force.

Write the equation for FE.

FE=eEH . (II)

Here, EH is the electric field.

Write the equation for FB.

FB=evdB . (III)

Here, B is the magnetic field.

Rewrite equation (I) by substituting equations (II) and (III).

eEH=evdBEH=vdB

Write the equation for hall voltage.

VH=EHw

Here, VH is the hall voltage.

Rewrite the above relation by substituting vdB for EH.

VH=(vdB)w

Conclusion:

Substitute 1.1mm/s for vd, 0.80T for B, and 20.0mm for w in the above equation to find VH.

VH=(1.1mm/s(103m1mm))(0.80T)(20.0mm(103m1mm))=17×106V(103μV1V)=17μV

Therefore, the hall voltage is 17μV.

(c)

To determine

The side of voltmeter with higher potential.

(c)

Expert Solution
Check Mark

Answer to Problem 121P

The left side of voltmeter is at higher potential.

Explanation of Solution

The higher potential side can be identified from the direction of electron flow. Electrons flow from higher potential side to lower potential side.

Here, electrons towards right side of voltmeter. That is, the left side of potentiometer is at higher potential. Therefore, the left side of voltmeter is at higher potential.

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Chapter 19 Solutions

Physics

Ch. 19.6 - 19.6 Suppose the magnetic field in Fig. 19.28 were...Ch. 19.6 - 19.8 Magnetic Force on a Current-Carrying Wire A...Ch. 19.7 - CHECKPOINT 19.7 Suppose the coil of wire in Fig....Ch. 19.7 - Practice Problem 19.9 Torque on a Coil Starting...Ch. 19.8 - 19.8 What is the direction of the magnetic field...Ch. 19.8 - 19.10 Field Midway Between Two Wires Find the...Ch. 19.9 - Prob. 19.11PPCh. 19 - Prob. 1CQCh. 19 - Prob. 2CQCh. 19 - Prob. 3CQCh. 19 - Prob. 4CQCh. 19 - Prob. 5CQCh. 19 - Prob. 6CQCh. 19 - Prob. 7CQCh. 19 - Prob. 8CQCh. 19 - Prob. 9CQCh. 19 - Prob. 10CQCh. 19 - Prob. 11CQCh. 19 - Prob. 12CQCh. 19 - Prob. 13CQCh. 19 - Prob. 14CQCh. 19 - Prob. 15CQCh. 19 - Prob. 16CQCh. 19 - Prob. 17CQCh. 19 - Prob. 18CQCh. 19 - Prob. 19CQCh. 19 - Prob. 20CQCh. 19 - Prob. 21CQCh. 19 - Prob. 22CQCh. 19 - Prob. 23CQCh. 19 - Prob. 1MCQCh. 19 - Prob. 2MCQCh. 19 - Multiple-Choice Questions 1-4. In the figure, four...Ch. 19 - Prob. 4MCQCh. 19 - Prob. 5MCQCh. 19 - Prob. 6MCQCh. 19 - Prob. 7MCQCh. 19 - Prob. 8MCQCh. 19 - Multiple-Choice Questions 6-9. A wire carries...Ch. 19 - Prob. 10MCQCh. 19 - 11. The magnetic forces that two parallel wires...Ch. 19 - Prob. 12MCQCh. 19 - 1. At which point in the diagram is the magnetic...Ch. 19 - 2. Draw vector arrows to indicate the direction...Ch. 19 - Problems 3-6. Sketch some magnetic field lines for...Ch. 19 - Prob. 4PCh. 19 - Prob. 5PCh. 19 - Problems 3–6. Sketch some magnetic field lines for...Ch. 19 - 7. Find the magnetic force exerted on an electron...Ch. 19 - 8. Find the magnetic force exerted on a proton...Ch. 19 - 9. A uniform magnetic field points north; its...Ch. 19 - 10. A uniform magnetic field points vertically...Ch. 19 - Problems 11-14. Several electrons move at speed...Ch. 19 - 12. Find the magnetic force on the electron at...Ch. 19 - 12. Find the magnetic force on the electron at...Ch. 19 - Problems 11-14. Several electrons move at speed...Ch. 19 - 15. A magnet produces a 0.30 T field between its...Ch. 19 - 16. At a certain point on Earth’s surface in the...Ch. 19 - 17. A cosmic ray muon with the same charge as an...Ch. 19 - 18. In a CRT. electrons moving at 1.8 × 107 m/s...Ch. 19 - 19. A positron (q = +e) moves at 5.0 × 107 m/s in...Ch. 19 - 20. ✦ An electron moves with speed 2.0 × 105 m/s...Ch. 19 - 21. ✦ An electron moves with speed 2.0 × 105 m/s...Ch. 19 - 19.3 Charged Particle Moving Perpendicularly to a...Ch. 19 - 23. Six protons move (at speed v) in magnetic...Ch. 19 - 24. An electron moves at speed 8.0 × 105 m/s in a...Ch. 19 - 25. The magnetic field in a hospital’s cyclotron...Ch. 19 - 26. The magnetic field in a cyclotron used in...Ch. 19 - 27. The magnetic field in a cyclotron used to...Ch. 19 - 28. A beam of α particles (helium nuclei) is used...Ch. 19 - 29. A singly charged ion of unknown mass moves in...Ch. 19 - 30. In one type of mass spectrometer, ions having...Ch. 19 - 31. Natural carbon consists of two different...Ch. 19 - 32. After being accelerated through a potential...Ch. 19 - 33. A sample containing carbon (atomic mass 12 u),...Ch. 19 - Prob. 34PCh. 19 - 35. Show that the time for one revolution of a...Ch. 19 - 36. Crossed electric and magnetic fields are...Ch. 19 - 37. A current I = 40.0 A flows through a strip of...Ch. 19 - 38. In Problem 37, if the width of the strip is...Ch. 19 - 39. In Problem 37, the width of the strip is 3.5...Ch. 19 - 40. The strip in the diagram is used as a Hall...Ch. 19 - 41. A strip of copper 2.0 cm wide carries a...Ch. 19 - Prob. 42PCh. 19 - 43. An electromagnetic flowmeter is used to...Ch. 19 - 44. A charged particle is accelerated from rest...Ch. 19 - 45. A straight wire segment of length 0.60 m...Ch. 19 - 46. A straight wire segment of length 25 cm...Ch. 19 - 47. Parallel conducting tracks, separated by 2.0...Ch. 19 - 48. An electromagnetic rail gun can fire a...Ch. 19 - 49. A straight, stiff wire of length 1.00 m and...Ch. 19 - Prob. 50PCh. 19 - Prob. 51PCh. 19 - Prob. 52PCh. 19 - 53. ✦ A straight wire is aligned east-west in a...Ch. 19 - 54. A straight wire is aligned north-south in a...Ch. 19 - 55. In each of six electric motors, a cylindrical...Ch. 19 - 56. In an electric motor, a circular coil with...Ch. 19 - 57. In an electric motor, a coil with 100 turns of...Ch. 19 - 58. A square loop of wire of side 3.0 cm carries...Ch. 19 - 59. The intrinsic magnetic dipole moment of the...Ch. 19 - 60. In a simple model, the electron in a hydrogen...Ch. 19 - 61. A certain fixed length L of wire carries a...Ch. 19 - 62. Use the following method to show that the...Ch. 19 - 63. A square loop of wire with side 0.60 m carries...Ch. 19 - Prob. 64PCh. 19 - 65. Estimate the magnetic field at distances of...Ch. 19 - Prob. 66PCh. 19 - 67. Kieran measures the magnetic field of an...Ch. 19 - 68. Two wires each carry 10.0 A of current (in...Ch. 19 - In Problem 67, what is the magnetic field at a...Ch. 19 - What is the magnetic field at point P if the...Ch. 19 - 70. Point P is midway between two long, straight,...Ch. 19 - 70. Point P is midway between two long, straight,...Ch. 19 - Prob. 72PCh. 19 - Prob. 73PCh. 19 - 74. Two long straight wires carry the same amount...Ch. 19 - 75. In Problem 74, find the magnetic field at...Ch. 19 - 76. In Problem 74, find the magnetic field at...Ch. 19 - 77. A solenoid of length 0.256 m and radius 2.0 cm...Ch. 19 - 78. Two long straight parallel wires separated by...Ch. 19 - Prob. 79PCh. 19 - Two concentric circular wire loops in the same...Ch. 19 - 81. You are designing the main solenoid for an MRI...Ch. 19 - 82. A solenoid has 4850 turns per meter and radius...Ch. 19 - 83. Find the magnetic field at the center of the...Ch. 19 - 84. Find the magnetic field at point P, the...Ch. 19 - Prob. 85PCh. 19 - Prob. 86PCh. 19 - Prob. 87PCh. 19 - 88. A number of wires carry currents into or out...Ch. 19 - 89. ✦ An infinitely long, thick cylindrical shell...Ch. 19 - 90. In this problem, use Ampère’s law to show...Ch. 19 - Prob. 91PCh. 19 - Prob. 92PCh. 19 - Prob. 93PCh. 19 - Prob. 94PCh. 19 - Prob. 95PCh. 19 - Prob. 96PCh. 19 - Prob. 97PCh. 19 - Prob. 98PCh. 19 - Prob. 99PCh. 19 - Prob. 100PCh. 19 - Prob. 101PCh. 19 - Prob. 102PCh. 19 - Prob. 103PCh. 19 - Prob. 104PCh. 19 - Prob. 105PCh. 19 - 106. Two conducting wires perpendicular to the...Ch. 19 - Prob. 107PCh. 19 - Prob. 108PCh. 19 - 110. A solenoid with 8500 turns per meter has...Ch. 19 - Prob. 109PCh. 19 - Prob. 111PCh. 19 - Prob. 115PCh. 19 - Prob. 112PCh. 19 - Prob. 113PCh. 19 - Prob. 114PCh. 19 - Prob. 117PCh. 19 - Prob. 116PCh. 19 - Prob. 118PCh. 19 - Prob. 120PCh. 19 - Prob. 121PCh. 19 - Prob. 122PCh. 19 - Prob. 123PCh. 19 - Prob. 124PCh. 19 - Prob. 125PCh. 19 - Prob. 126PCh. 19 - Prob. 127PCh. 19 - Prob. 128P
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