Differences
This shows you the differences between two versions of the page.
| Both sides previous revisionPrevious revision | |||
| courses:phy102:7 [2023/03/13 20:03] – [5. Force and torque on a current loop] asad | courses:phy102:7 [2023/03/13 20:06] (current) – [5. Force and torque on a current loop] asad | ||
|---|---|---|---|
| Line 72: | Line 72: | ||
| $$ \sum \vec{\tau} = \vec{\tau}_2 + \vec{\tau}_4 = F_2x\sin\theta\hat{i} - F_4(a-x)\sin\theta\hat{i} = -IabB\sin\theta\hat{i} = - IAB\sin\theta\hat{i} $$ | $$ \sum \vec{\tau} = \vec{\tau}_2 + \vec{\tau}_4 = F_2x\sin\theta\hat{i} - F_4(a-x)\sin\theta\hat{i} = -IabB\sin\theta\hat{i} = - IAB\sin\theta\hat{i} $$ | ||
| + | |||
| + | Define magnetic dipole moment as $\vec{\mu} = NIA\hat{n} $ and write | ||
| + | |||
| + | $$ \vec{\tau} = \vec{\mu} \times \vec{B}. $$ | ||
| + | |||
| + | And potential energy for a magnetic dipole $U=-\vec{\mu} \cdot \vec{B}$. | ||
| ===== - Hall effect ===== | ===== - Hall effect ===== | ||
courses/phy102/7.1678759418.txt.gz · Last modified: 2023/03/13 20:03 by asad