Test Physics Num 2
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A charged particle is moving in a circular orbit in a magnetic field. If the strength of the magnetic field doubles, how does the radius of the particle’s orbit change?
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Is dubel
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It gets halved
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Itget tripel
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Test physics num 2 explores key concepts in electromagnetism, including the behavior of compasses near magnets, the effects of changing current on magnetic forces, and the motion of charged particles in magnetic fields. This quiz is designed to assess understanding and application of these principles.
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- 2.
A positively charged particle in a uniform magnetic field moves in a circular path in the clockwise direction, parallel to the plane of the page. In what direction do the magnetic field lines point?
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Out of the page
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Into the page
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To the left
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To the right
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In a clockwise pattern parallel to the plane of the page
Correct Answer
A. Out of the pageExplanation
When a positively charged particle moves in a circular path in a clockwise direction, it experiences a magnetic force directed towards the center of the circle. According to the right-hand rule, the direction of the magnetic field lines is perpendicular to the plane of the page and points out of the page. This is because the magnetic field lines must be oriented in a way that generates a force towards the center of the circle, which corresponds to the particle's motion.Rate this question:
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- 3.
What should one do to maximize the magnitude of the magnetic force acting on a charged particle moving in a magnetic field? I. Maximize the strength of the magnetic field II. Minimize the particle’s velocity III. Ensure that the particle is moving in the same direction as the magnetic field lines
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I only
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I and III only
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I and II only
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I, II, and III
Correct Answer
A. I onlyExplanation
To maximize the magnitude of the magnetic force acting on a charged particle moving in a magnetic field, one should maximize the strength of the magnetic field. This is because the magnetic force is directly proportional to the strength of the magnetic field. Minimizing the particle's velocity or ensuring that the particle is moving in the same direction as the magnetic field lines does not have an effect on the magnitude of the magnetic force.Rate this question:
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- 4.
Two wires carry current in opposite directions. Which of the following graphs represents the magnetic force acting on each wire?
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Two up
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One up one down
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Two-wire carry current in opposite directions repel each other
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Two down
Correct Answer
A. Two-wire carry current in opposite directions repel each otherExplanation
When two wires carry current in opposite directions, they create magnetic fields that interact with each other. According to the right-hand rule, the magnetic field lines around each wire will form loops, and these loops will intersect and interact with each other. The interaction between the magnetic fields created by the currents in the wires results in a repulsive force between the wires. This repulsive force is represented by the graph "Two-wire carry current in opposite directions repel each other."Rate this question:
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- 5.
The pointer on a compass is the north pole of a small magnet. If a compass were placed next to a bar magnet, as shown above, in what direction would the pointer point?
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Up
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Left
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Right
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Down
Correct Answer
A. RightExplanation
When a compass is placed next to a bar magnet, the pointer on the compass, which is the north pole of a small magnet, will align itself with the magnetic field lines of the bar magnet. The magnetic field lines of a bar magnet extend from the north pole to the south pole. Since opposite poles attract, the north pole of the compass magnet will point towards the south pole of the bar magnet. Therefore, the pointer on the compass will point in the direction opposite to the north pole of the bar magnet, which is to the right.Rate this question:
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- 6.
Which of the following is not a possible trajectory of a charged particle in a uniform magnetic field?
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שמאלה
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חצי עיגול למעלה
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קו יורד למטה וימינה
Correct Answer
A. קו יורד למטה וימינה -
- 7.
A current-carrying wire passes through a uniform magnetic field, as shown above. At which point is the magnetic field the strongest?
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A
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B
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C
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D
Correct Answer
A. BExplanation
The magnetic field is strongest at point b because it is closest to the wire. According to the right-hand rule, the magnetic field lines around a current-carrying wire form concentric circles centered on the wire. The strength of the magnetic field decreases as you move further away from the wire. Therefore, point b, being the closest point to the wire, experiences the strongest magnetic field.Rate this question:
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- 8.
Which one do you like?
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Option 1
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Option 2
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Option 3
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Option 4
Correct Answer
A. Option 1 -
- 9.
A current-carrying wire in a magnetic field is subject to a magnetic force. If the current in the wire is doubled, what happens to the magnetic force acting on the wire?
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It is quartered
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It is halved
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It is unchanged
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It is doubled
Correct Answer
A. It is quarteredExplanation
When the current in a wire is doubled, the magnetic force acting on the wire is quartered. This is because the magnetic force is directly proportional to the current in the wire. When the current is doubled, the force becomes four times smaller (quartered) to maintain the equilibrium.Rate this question:
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Mar 20, 2023Quiz Edited by
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Jan 12, 2020Quiz Created by
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