Q. 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) $e\left( \overrightarrow{v} \bullet \overrightarrow{B} \right)$
C) $e(\overrightarrow{v} \times \overrightarrow{B})$
D) None of these
Explanation
(a) $F = qvB\sin\theta = qvB\sin{0 = 0}$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.