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We know that a changing electric field generates a magnetic field and that a changing magnetic field generates an electric field. But does a magnetic field generate a current ?

We also know that a charge generates an electric field.

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  • $\begingroup$ The first sentence isn't true as written. $\endgroup$ – Hal Hollis Jun 13 '17 at 14:58
  • $\begingroup$ Current is the motion of charges due to whatever force, usially an electric field $\endgroup$ – user126422 Jun 13 '17 at 15:16
  • $\begingroup$ but charges generate an electric field so they generate their own "motor" ? $\endgroup$ – Romain B. Jun 13 '17 at 15:20
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A changing electric field generates a magnetic field and a changing magnetic field generates an electric field. A current generates a magnetic field, but not the other way round.

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  • $\begingroup$ Ok so the difference between an electric field and a current is ? $\endgroup$ – Romain B. Jun 13 '17 at 15:10
  • $\begingroup$ Current is movement of charge. Electric field is an association between points in space and vectors that tells you what force would be experienced by a charge (independent of whether there's actually any charge present) . $\endgroup$ – The Photon Jun 13 '17 at 15:20
  • $\begingroup$ @Haatox, it's really an electromagnetic field which can support electromagnetic waves that propagate with speed c in vacuum (no electric charge moving or otherwise present). Electric current is the flow of electric charge and electric charge is a property of an object, e.g., an electron, and not an object itself. $\endgroup$ – Hal Hollis Jun 13 '17 at 15:34
  • $\begingroup$ "A current generates a magnetic field, but not the other way round." A magnetic field does induce a current. $\endgroup$ – Brad S Jun 13 '17 at 17:13
  • $\begingroup$ @BradS, Changing magnetic field produces current, not just magnetic field. $\endgroup$ – Mitchell Jun 14 '17 at 18:19

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