phys: Correct electromagnetic force symbol

2021-07-08 18:29:09 -04:00 · 2021-07-08 18:29:09 -04:00 · faf6135a19
commit faf6135a19
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--- a/docs/sph4u7.md
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@ -56,7 +56,7 @@ $$|F_m|=qvB\sin\theta$$
 Regardless of $\theta$, the force vector is always perpendicular to both $B$ and $v$,

 The above equation can be rearranged to find **electromagnetic** force in terms of current and wire length in a **uniform magnetic field**:
-$$|F_em|=BIL\sin\theta$$
+$$|F_{em}|=BIL\sin\theta$$

 <img src="/resources/images/magnet-on-wire.png" width=700>(Source: Kognity</img>