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--- 184_notes:examples:week6_drift_speed [2017/09/26 16:04] – [Solution] tallpaul
+++ 184_notes:examples:week6_drift_speed [2017/09/26 16:05] – [Example: Drift Speed in Different Types of Wires] tallpaul
@@ Line 1: / Line 1: @@
 =====Example: Drift Speed in Different Types of Wires=====
-Suppose you have a two wires. Each has a current of $5 \text{ A}$. One is made of copper (Cu) and has radius $0.5 \text{ mm}$. The other is made of zinc (Zn) and has radius $0.1 \text{ mm}$. What is the drift speed of electrons in each wire? You may want to consult the table below.
+Suppose you have a two wires. Each has a current of $5 \text{ A}$. One is made of copper (Cu) and has radius $0.5 \text{ mm}$. The other is made of zinc (Zn) and has radius $0.1 \text{ mm}$. What are the drift speeds of electrons in each wire? You may want to consult the table below.
 {{ 184_notes:6_n_table.jpg?800 |Properties of Metals}}
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 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}} =  &,& v_{\text{avg, Cu}} =
+v_{\text{avg, Cu}} = 0.47 \text{ mm/s} &,& v_{\text{avg, Zn}} = 7.5 \text{ mm/s}
 \end{align*}