A) zero
B) -evB
C) ilB
D) None of these
Correct Answer: A
Solution :
A magnetic field is produced around and within the solenoid. The magnetic field within the solenoid is uniform and parallel to the axis of solenoid. \[{{F}_{m}}=q(\overrightarrow{\mathbf{v}}\times \overrightarrow{\mathbf{B}})=Bqv\,\,\sin \theta \] Since, angle between \[\overrightarrow{\mathbf{v}}\] and \[\overrightarrow{\mathbf{B}}={{0}^{o}}\], therefore \[{{F}_{m}}=0\]. Now, \[W=\overrightarrow{\mathbf{F}}\,\times \overrightarrow{\mathbf{d}}\,\cos \,\phi \] Since \[F=0\] \[\Rightarrow \] \[W=0\]You need to login to perform this action.
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