• question_answer If an electron is going in the direction of magnetic field $\overrightarrow{B}$ with the velocity of $\overrightarrow{v}$ then the force on electron is- A) Zero                             B) $e\left( \overrightarrow{v}\,.\,\overrightarrow{B} \right)$C) $e\left( \overrightarrow{v}\,\,\times \,\,\overrightarrow{B} \right)$                D) None of these

$\theta =0$ $\sin \,\,\theta =0$ $F\,\,=\,\,eVB\text{ }sin\text{ }\theta \,\,=\,\,0$