College Physics Reasoning and Relationships

Physics & Astronomy

Quiz 20 :

Magnetic Fields and Forces

Quiz 20 :

Magnetic Fields and Forces

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If an electron is released at the equator and falls toward the Earth under the influence of gravity, the magnetic force on the electron will be toward the:
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C

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A deuteron, with the same charge but twice the mass of a proton, moves with a speed of 6.0 105 m/s perpendicular to a uniform magnetic field of 0.20 T. Which of the paths described below would it follow? (qp = 1.6 1019 C and md = 3.34 1027 kg)
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A

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A current in a long, straight wire produces a magnetic field. The magnetic field lines:
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B

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A proton is released such that it has an initial speed of 5.0 105 m/s from left to right across the page. A magnetic field of 1.2 T is present at an angle of 30° to the horizontal direction (or positive x axis). What is the magnitude of the force experienced by the proton? (qp = 1.6 1019 C)
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Electrical charges and magnetic poles have many similarities, but one difference is:
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Two singly ionized isotopes, X and Y, of the same element move with the same speed perpendicular to a uniform magnetic field. Isotope X follows a path of radius 3.35 cm while isotope Y moves along a path 3.43 cm in radius. What is the ratio of the two isotope masses, mY/mX?
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A bar magnet is attached solidly to a frictionless surface and its length is aligned with the x axis. To the right of the first magnet a short distance away is a second bar magnet with its center placed on the x axis and its length perpendicular to the x axis. The second magnet is free to move. Once placed in position at rest, which best describes the initial motion of the second magnet?
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A proton moves across the Earth's equator in a northwesterly direction. At this point the Earth's magnetic field has a direction due north and is parallel to the surface. What is the direction of the force acting on the proton at this instant?
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A proton, which moves perpendicular to a magnetic field of 0.60 T in a circular path of radius 0.080 m, has what speed? (qp = 1.6 1019 C and mp = 1.67 1027 kg)
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An electron which moves with a speed of 7.5 103 m/s parallel to a uniform magnetic field of 0.40 T experiences a force of what magnitude? (e = 1.6 1019 C)
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The force on a charged particle created by its motion in a magnetic field is maximum at what angle between the particle velocity and field?
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There is a magnetic force on a particle. It is possible that the particle is:
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An electron is released such that its initial velocity is from right to left across this page. The electron's path, however, is deflected in a direction toward the bottom edge of the page due to the presence of a uniform magnetic field. What is the direction of this field?
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A proton moving at a speed of 3.8 106 m/s cuts across the lines of a magnetic field at an angle of 40°. The strength of the field is 0.25 104 T. What is the magnitude of the force acting on the proton? (qp = 1.6 1019 C)
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A stationary positive charge +Q is located in a magnetic field B, which is directed toward the right as indicated. The direction of the magnetic force on Q is: img
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Assume that a uniform magnetic field is directed into this page. If a proton is released with an initial velocity directed from the bottom edge to the top edge of the page, which of the following describes the direction of the resultant force acting on the proton?
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A proton moving with a speed of 6.0 105 m/s perpendicular to a uniform magnetic field of 0.20 T will follow which of the paths described below? (qp = 1.6 1019 C and mp = 1.67 1027 kg)
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The right-hand rule allows one to find a property of the interaction of a magnetic field with a charged particle. The right-hand rule applied to moving charges:
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Three identical bar magnets, each 2 cm long, are placed in a straight line on a frictionless surface with their ends equally spaced with 2 cm between ends. They are constrained so they cannot rotate, but they can slide along the straight line. The left magnet has its north pole nearest the north pole of the middle magnet, and the right magnet has its south pole toward the middle magnet's south pole. Once they are in place and released from rest, which of the following best describes the motion of the magnets?
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The path of a charged particle moving perpendicular to a uniform magnetic field will be a:
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