184_notes:examples:week6_drift_speed

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184_notes:examples:week6_drift_speed [2017/09/26 15:58] – [Solution] tallpaul184_notes:examples:week6_drift_speed [2017/09/26 16:05] – [Solution] tallpaul
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 We now have enough information to solve for the drift speed of electrons. We use positive numbers below, since we care only about speed for now, not direction. We now have enough information to solve for the drift speed of electrons. We use positive numbers below, since we care only about speed for now, not direction.
  
-$$v_{avg} = $$+$$v_{avg} = \frac{I}{\pi r^2 n q}$$ 
 + 
 +Current ($I$), radius ($r$), electron density ($n$), and electron charge ($q$) are all things we know for our two wires. When we plug in the numbers, we get the following: 
 +\begin{align*} 
 +v_{\text{avg, Cu}} = 0.47 \text{ mm/s} &,& v_{\text{avg, Zn}} = 7.5 \text{ mm/s} 
 +\end{align*}
  • 184_notes/examples/week6_drift_speed.txt
  • Last modified: 2021/06/08 00:49
  • by schram45