An electron is allowed to move with constant velocity along the axis… | JEE Main 2023 (11 Apr, Shift 2)

Q43JEE Main 2023 · 11 APR · SHIFT 2Easy

Moving Charge in a Magnetic Field

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:

Show answer and solution

Answer: (b)

Inside the solenoid $\vec{B}$ is along the axis, parallel to $\vec{v}$ , so $F = 0$ .
No force: B true, A false; velocity stays constant along the axis: C true; D and E false.
So the answer is (b) B and C only.

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