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 accelerated along the axis
B
The electron path will be circular about the axis
C
The electron will experience a force at 
to the axis and hence execute-a helical path
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
Text Solution
Verified by ExpertsThe correct answer is:
D
Magnetic Lorentz force on electron is projected with uniform velocity along the axis of a current carrying long solenoid.
As magnetic field and velocity are parallel. The electron will continue to move with uniform velocity along the axis of the solenoid.
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