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184_notes:q_b_force [2017/10/24 14:59] – dmcpadden | 184_notes:q_b_force [2017/11/02 22:00] – dmcpadden | ||
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+ | Section 20.1 in Matter and Interactions (4th edition) | ||
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===== Magnetic Force on Moving Charges ===== | ===== Magnetic Force on Moving Charges ===== | ||
We'll start thinking about the magnetic force in terms of the simplest case: a single moving charge through an external magnetic field. The source of the external magnetic field could be another moving charge, a current, a bar magnet or any combination of those. Most of the time though, we will concern ourselves with how the charge interacts with the field (whatever it may be) and we will not care as much about what produces that magnetic field. These notes will describe how we can calculate the force from the magnetic field, including the magnitude and direction of that force. | We'll start thinking about the magnetic force in terms of the simplest case: a single moving charge through an external magnetic field. The source of the external magnetic field could be another moving charge, a current, a bar magnet or any combination of those. Most of the time though, we will concern ourselves with how the charge interacts with the field (whatever it may be) and we will not care as much about what produces that magnetic field. These notes will describe how we can calculate the force from the magnetic field, including the magnitude and direction of that force. | ||
+ | {{youtube> | ||
==== Magnetic Force Equation ==== | ==== Magnetic Force Equation ==== | ||
Mathematically, | Mathematically, | ||
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=== Direction of the Magnetic Force === | === Direction of the Magnetic Force === | ||
+ | {{184_notes: | ||
Just like we did with the [[184_notes: | Just like we did with the [[184_notes: | ||
- | FIXME Add Picture 11.1/11.2 | + | {{ 184_notes: |
- | For example, if the charge is moving to the right ($+\hat{x}$ direction) through a magnetic field that points into the page ($-\hat{z}$ direction), you should find that the force on the charge points up ($+\hat{y}$ direction). | + | For example, if the charge is moving to the right ($+\hat{x}$ direction) through a magnetic field that points into the page ($-\hat{z}$ direction), you should find that the force on the charge points up ($+\hat{y}$ direction). |
+ | ==== Examples ==== | ||
+ | [[: |