Ap physics c ampere's law and biot-savart

  1. For AP Physics C level, I am having trouble on deciding whether to use Ampere's Law or use Biot-Savart.

    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. jcsd
  3. WannabeNewton

    WannabeNewton 5,859
    Science Advisor

    If the system under consideration has high degrees of symmetry (e.g. spherical or cylindrical symmetry) then use Ampere's law. Biot-Savart 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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: ap physics