Consider a wire carrying a steady current, I placed in a uniform magnetic field B perpendicular to its length. Consider the charges inside the wire. It is known that magnetic forces do no work. This
\( \mathrm{P} \) implies that,
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(a) motion of charges inside the conductor is unaffected by \( \mathbf{B} \) since they do not absorb energy.
(b) some charges inside the wire move to the surface as a result of \( \mathbf{B} \).
(c) if the wire moves under the influence of \( \mathbf{B} \), no work is done by the force.
(d) if the wire moves under the influence of \( \mathbf{B} \), no work is done by the magnetic force on the ions, assumed fixed within the wire.
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