Question

An electron is not deflected on passing through a certain region because :

• A. there is no magnetic field in that region
• B. there is a magnetic field but velocity of the electron is parallel to the direction of magnetic field
• C. the electron is a charge less particle
• D. none of the above

Answer 1

Answer: (A), (B)

there is no magnetic field in that region
there is a magnetic field but velocity of the electron is parallel to the direction of magnetic field

An electron is not deflected on passing through a certain region because of two reasons :
1) there is no magnetic field in that region.
2) Even though there is a magnetic field but velocity of the electron is parallel to the direction of magnetic field.
Hence, options A, B are correct.