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In what respect does a wire carrying a c...

In what respect does a wire carrying a current differ from a wire, which carries no current?

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A current carrying wire produces a magnetic field. When current is flowing through a wire, the electrons move inside it along a definite direction. On the other hand, if no current is flowing through a wire, the electrons inside this wire are in random moiton, their average thermal velocity is zero. Such a wire does not produce any magnetic field.
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