Question

You are sitting in a room in which uniform magnetic field is present in vertically downward direction. When an electron is projected in horizontal direction, it will be moving in circular path with constant speed

• A. clockwise in vertical plane
• B. clockwise in horizontal plane
• C. anticlockwise in horizontal plane
• D. anticlockwise in vertical plane

Answer 1

Answer: (B)

by $F=q\overrightarrow{v}\times \overrightarrow{B}$
where $q$ is $-ve$
therefore, it will be moving in a circular path with constant speed clockwise in horizontal plane