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Ap physics c ampere's law and biotsavart 
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#1
Apr2214, 03:02 PM

P: 55

For AP Physics C level, I am having trouble on deciding whether to use Ampere's Law or use BiotSavart.
Are there any hints/tricks for deciding what to use? For example, in solenoids i heard it's easiest to use Ampere's Law 


#2
Apr2214, 04:34 PM

C. Spirit
Sci Advisor
Thanks
P: 5,426

If the system under consideration has high degrees of symmetry (e.g. spherical or cylindrical symmetry) then use Ampere's law. BiotSavart is a brute force method that you only want to use when you have no symmetry arguments at your disposal. At the level of AP Physics C it will be obvious from the problem whether or not a system has high degrees of symmetry so as to allow for an elegant solution through Ampere's law.



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