184_notes:ac

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184_notes:ac [2020/08/24 17:50] – dmcpadden184_notes:ac [2021/07/06 16:50] – bartonmo
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 As we said before, one of the most important sources of a changing magnetic field is an alternating current. This is what actually comes out of the wall outlets; as opposed to the current from a battery which is a constant current (or a direct current). We are only briefly going to talk about alternating current as it refers to induction and changing magnetic flux, but there are many more applications of alternating current, especially with regard to circuits, resistors, and capacitors. For the purposes of these notes, we will talk about how we represent an alternating current, how that alternating current can produce an induced current/potential, and how that applies to voltage transformers. As we said before, one of the most important sources of a changing magnetic field is an alternating current. This is what actually comes out of the wall outlets; as opposed to the current from a battery which is a constant current (or a direct current). We are only briefly going to talk about alternating current as it refers to induction and changing magnetic flux, but there are many more applications of alternating current, especially with regard to circuits, resistors, and capacitors. For the purposes of these notes, we will talk about how we represent an alternating current, how that alternating current can produce an induced current/potential, and how that applies to voltage transformers.
  
-==== Alternating Current ====+===== Alternating Current =====
 [{{  184_notes:Week14_6.png?200|Current over time in an alternating current cycle}}] [{{  184_notes:Week14_6.png?200|Current over time in an alternating current cycle}}]
  
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 This means that a larger period would be related to a smaller frequency, and a smaller period would be related to a higher frequency. Since the period is often easier to think about conceptually, it may be easier to start with period (from a graph for example) and then relate it back to the frequency.    This means that a larger period would be related to a smaller frequency, and a smaller period would be related to a higher frequency. Since the period is often easier to think about conceptually, it may be easier to start with period (from a graph for example) and then relate it back to the frequency.   
  
-==== Voltage Transformer ====+===== Voltage Transformer =====
 If you have an oscillating current, this would also mean that you would have an oscillating magnetic field everywhere around the wire (since currents create magnetic fields). If there is an oscillating magnetic field, this means that there will also be an induced potential/current in any nearby loop of wire since the magnetic field would be constantly changing. One common application of this idea is called a step-up transformer (or alternatively a step-down transformer), which is crucial to getting electricity from the power generator to your house. If you have an oscillating current, this would also mean that you would have an oscillating magnetic field everywhere around the wire (since currents create magnetic fields). If there is an oscillating magnetic field, this means that there will also be an induced potential/current in any nearby loop of wire since the magnetic field would be constantly changing. One common application of this idea is called a step-up transformer (or alternatively a step-down transformer), which is crucial to getting electricity from the power generator to your house.
  
  • 184_notes/ac.txt
  • Last modified: 2021/07/13 13:30
  • by schram45