A) angle between \[\vec{v}\] and \[\vec{B}\] is necessarily \[{{90}^{o}}\]
B) angle between \[\vec{v}\] and \[\vec{B}\] can have any value other than \[{{90}^{o}}\]
C)
angle between \[\vec{v}\] and \[\vec{B}\] can have any value other than zero and \[{{180}^{o}}\] D)
angle between \[\vec{v}\] and \[\vec{B}\] is either zero or \[{{180}^{o}}\]
Correct Answer:
C Solution :
\[F=qvB\sin \theta \] If \[\theta ={{0}^{o}}\] or \[{{180}^{o}},\] then sin \[\theta =0\] \[\therefore \] \[F=qvB\sin \theta \] Since, force on charged particle is non-zero, so angle between \[\vec{v}\] and \[\vec{B}\] can have any value other than zero and \[{{180}^{o}}\].
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