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Ampere's law and biot-savort law

  1. Jun 1, 2009 #1
    stupid question -
    Why do we need Biot Savart law when we have ampere's law to determine the B field around a current carrying wire.
  2. jcsd
  3. Jun 1, 2009 #2


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    Because Ampere's law is useful only when you have a highly symmetric system.

    This is similar to Gauss's law and Coulomb's law. Gauss's law is very useful when you have a highly symmetry configuration. But when it isn't, you have to go back to Coulomb's law.

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