184_notes:examples:week10_force_on_charge

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184_notes:examples:week10_force_on_charge [2017/10/29 22:11] – [Solution] tallpaul184_notes:examples:week10_force_on_charge [2017/10/29 22:24] – [Solution] tallpaul
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   * We represent the two situations below.   * We represent the two situations below.
  
-{{ 184_notes:10_moving_charge.png?200 |Moving Charge in a Magnetic Field}}+{{ 184_notes:10_moving_charge.png?500 |Moving Charge in a Magnetic Field}}
 ====Solution==== ====Solution====
 Let's start with the first case, when $\vec{v}=10 \text{ m/s } \hat{x}$. Let's start with the first case, when $\vec{v}=10 \text{ m/s } \hat{x}$.
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 $$\vec{F}_B = q \vec{v} \times \vec{B} = 1.5 \text{ mC } \cdot 4\cdot 10^{-3} \text{ T} \cdot \text{m/s } \hat{z} = 6 \mu\text{N}$$ $$\vec{F}_B = q \vec{v} \times \vec{B} = 1.5 \text{ mC } \cdot 4\cdot 10^{-3} \text{ T} \cdot \text{m/s } \hat{z} = 6 \mu\text{N}$$
  
-Notice that the $\sin 90^{\text{o}}$ term evaluates to $1$. This is the maximum value it can be, and we get this value because the velocity and the B-field were exactly perpendicular. Any other orientation would have yielded a weaker magnetic force. In fact, in the second case, when the velocity is parallel to the magnetic field, the cross product evaluates to 0. See below for both calculations.+Notice that the $\sin 90^{\text{o}}$ term evaluates to $1$. This is the maximum value it can be, and we get this value because the velocity and the B-field are exactly perpendicular. Any other orientation would have yielded a weaker magnetic force. In fact, in the second case, when the velocity is parallel to the magnetic field, the cross product evaluates to $0$. See below for the calculations.
  
 \begin{align*} \begin{align*}
  • 184_notes/examples/week10_force_on_charge.txt
  • Last modified: 2017/11/02 13:32
  • by dmcpadden