Question

A particle of mass \( m \) and charge \( q \) with an initial velocity \( \vec{v} \) is subjected to a uniform magnetic field \( \vec{B} \) along the vertical direction. The particle will

• A. follow a circular path if $\vec{v}$ is along the vertical direction
• B. make helical motion if $\vec{v}$ is along the horizontal direction
• C. make helical motion if $\vec{v}$ is neither parallel nor orthogonal to $\vec{B}$
• D. always make circular motion
• E. always make helical motion

Hint:

Remember: 1. Parallel ($\theta = 0^{\circ}$) $\rightarrow$ Straight line. 2. Perpendicular ($\theta = 90^{\circ}$) $\rightarrow$ Circle. 3. Any other angle $\rightarrow$ Helix.

Answer 1

The Correct Option is C