Q. Current $i_{0}$ is passed through a solenoid of length $l$ having number of turns $N$ when it is connected to a DC source. A charged particle with charge $q$ is projected along the axis of the solenoid with a speed $v_{0}$. The velocity of the particle in the solenoid
A) Increases
B) Decreases
C) Remain same
D) Becomes zero
Explanation
(c) Magnetic field due to solenoid is directed along its axis. The charged particle projected along the axis of solenoid does experience any magnetic force. So, velocity of charged particle remains unchanged.
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.