Q 12-04-126JEE MainJEE Main 2023 (11 Apr, Shift 2)Easy
An electron is allowed to move with constant velocity along the axis of current carrying straight solenoid.
(A) The electron will experience magnetic force along the axis of the solenoid.
(B) The electron will not experience magnetic force.
(C) The electron will continue to move along the axis of the solenoid.
(D) The electron will be accelerated along the axis of the solenoid.
(E) The electron will follow parabolic path inside the solenoid.
Choose the correct answer from the options given below:
Answer: (C) B and C only
On the axis the field is along the axis, parallel to the velocity, so $\vec F=q\vec v\times\vec B=0$. The electron keeps moving along the axis with the same velocity: B and C.
Solution by Sreeraj P, M.Sc Physics