Question

An electron is projected with uniform velocity along the axis of a current carrying long solenoid. Which of the following is true?

• A. The electron will be acceleration along the axis
• B. The electron's path will be circular about the axis
• C. The electron will experience a force at 45$^\circ$ to the axis and hence execute a-helical path
• D. The electron will continue to move with uniform velocity along the axis of the solenoid

Answer 1

Answer: (D)

The electron will continue to move with uniform velocity along the axis of the solenoid

Answer 2

Magnetic field ($\bar{B}$ ) due to the current-carring solenoid is along its axis, i.e in the direction of unifrom velocity $(\bar{v})$ 6f the electron Clearly, as, the electfon cb'ntinueSTo move with uniform