184_notes:what_happens

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184_notes:what_happens [2021/04/08 13:56] dmcpadden184_notes:what_happens [2021/06/17 15:22] – [What happens when Magnetic Fields Change?] bartonmo
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 Thus far in this course, we have considered the [[184_notes:pc_efield|electric]] and [[184_notes:moving_q|magnetic]] fields completely separately, either only looking at the effects of an electric field by itself or a magnetic field by itself. However, there are many real-world contexts where a charge may be moving in a magnetic field and also near other charges. This means the charge would feel both an [[184_notes:pc_force|electric force]] and a [[184_notes:q_b_force|magnetic force]]. Through Newton's second law ($\vec{F}_{net}=\vec{F}_1+\vec{F}_2+...$), we can think about how the combination of these forces affects individual charges. Using the magnetic and electric force is one way that we can think about combining electric and magnetic fields. Note that this is not a direct relationship between electric field and magnetic field, but rather relies on using force.  Thus far in this course, we have considered the [[184_notes:pc_efield|electric]] and [[184_notes:moving_q|magnetic]] fields completely separately, either only looking at the effects of an electric field by itself or a magnetic field by itself. However, there are many real-world contexts where a charge may be moving in a magnetic field and also near other charges. This means the charge would feel both an [[184_notes:pc_force|electric force]] and a [[184_notes:q_b_force|magnetic force]]. Through Newton's second law ($\vec{F}_{net}=\vec{F}_1+\vec{F}_2+...$), we can think about how the combination of these forces affects individual charges. Using the magnetic and electric force is one way that we can think about combining electric and magnetic fields. Note that this is not a direct relationship between electric field and magnetic field, but rather relies on using force. 
  
-The notes this week are going to focus on a more fundamental (and direct) relationship between electric and magnetic fields, which hinges on a **changing** magnetic field rather than a constant magnetic field. So our starting question is: what happens when you have a changing magnetic field? The following video demonstrates what happens when you move a permanent magnet towards a coil of wire. The coil is connected to a [[https://en.wikipedia.org/wiki/Galvanometer|galvanometer]], which is a device that measures small currents (on the order of $\mu A$), but it is not connected to a battery.  +The notes this week are going to focus on a more fundamental (and direct) relationship between electric and magnetic fields, which hinges on a //changing// magnetic field rather than a //constant// magnetic field. So our starting question is: what happens when you have a changing magnetic field? The following video demonstrates what happens when you move a permanent magnet towards a coil of wire. The coil is connected to a [[https://en.wikipedia.org/wiki/Galvanometer|galvanometer]], which is a device that measures small currents (on the order of $\mu A$), but it is not connected to a battery.  
  
 {{youtube>FLiEX076vQU?large}} {{youtube>FLiEX076vQU?large}}
  • 184_notes/what_happens.txt
  • Last modified: 2021/06/17 15:24
  • by bartonmo