Podcast
Questions and Answers
At any location, the direction of the magnetic field B is the direction in which:
At any location, the direction of the magnetic field B is the direction in which:
- The south pole of a compass needle points
- The magnetic field lines inside the magnet point towards
- The magnetic field lines outside the magnet point towards
- The north pole of a compass needle points (correct)
What symbol has historically been used to represent a magnetic field?
What symbol has historically been used to represent a magnetic field?
- M
- B (correct)
- S
- C
How can magnetic field lines of a bar magnet be traced according to the text?
How can magnetic field lines of a bar magnet be traced according to the text?
- By heating the bar magnet and observing the pattern
- By observing the color changes on the bar magnet
- By using a magnifying glass on the bar magnet
- By means of drawings with magnetic field lines (correct)
When tracing the magnetic field lines of a bar magnet, where do the magnetic field lines outside the magnet point?
When tracing the magnetic field lines of a bar magnet, where do the magnetic field lines outside the magnet point?
How can one display magnetic field patterns of a bar magnet, as shown in Figure 28.2?
How can one display magnetic field patterns of a bar magnet, as shown in Figure 28.2?
Why is the north pole of a magnetic attracted toward the north geographic pole of Earth?
Why is the north pole of a magnetic attracted toward the north geographic pole of Earth?
What is the relationship between the magnetic field lines and the magnetic field vector at any point?
What is the relationship between the magnetic field lines and the magnetic field vector at any point?
How are the magnetic forces on oppositely charged particles moving at the same velocity in a magnetic field related?
How are the magnetic forces on oppositely charged particles moving at the same velocity in a magnetic field related?
What is the significance of the dashed lines in the figure?
What is the significance of the dashed lines in the figure?
According to the right-hand rule in Figure 28.5a, how can the direction of the cross product $\vec{v} \times \vec{B}$ be determined?
According to the right-hand rule in Figure 28.5a, how can the direction of the cross product $\vec{v} \times \vec{B}$ be determined?
What is the relationship between the magnetic force $\vec{F}_B$ and the cross product $\vec{v} \times \vec{B}$?
What is the relationship between the magnetic force $\vec{F}_B$ and the cross product $\vec{v} \times \vec{B}$?
What is the meaning of the magnetic field $\vec{B}$ at a given point in space?
What is the meaning of the magnetic field $\vec{B}$ at a given point in space?
What is the pattern of the magnetic field between opposite poles (NS) of two bar magnets?
What is the pattern of the magnetic field between opposite poles (NS) of two bar magnets?
What is the pattern of the magnetic field between like poles (NN) of two bar magnets?
What is the pattern of the magnetic field between like poles (NN) of two bar magnets?
How does the Earth's magnetic field compare to the magnetic field of a bar magnet?
How does the Earth's magnetic field compare to the magnetic field of a bar magnet?
What happens to the orientation of a compass needle as it is moved northward?
What happens to the orientation of a compass needle as it is moved northward?
What is the difference between the North magnetic pole and the North geographic pole?
What is the difference between the North magnetic pole and the North geographic pole?
How has the position of the North magnetic pole changed over time?
How has the position of the North magnetic pole changed over time?
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