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Consider a wire carrying a steady current , I placed in a uniform magnetic field $ \overrightarrow B$ perpendicular to its length . Consider the charge inside the wire. It is known that magnetic forces do not work. This implies the

$\begin{array}{1 1} \text{motion of charge inside the conductor is unaffected by $\overrightarrow{B}$ since they do not absorb energy } \\ \text{Some charges inside the wire ,move to the surface as a result of $\overrightarrow{B}$} \\ \text{if the wire moves under the influence of $\overrightarrow{B}$ no work is done by the force } \\ \text{if the wire moves under the influence of $\overrightarrow{B}$ no work is done by the magnetic force on the ions, assumed fixed within the wire.} \end{array} $

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