Question

Imagine that you are sitting in a room with your back to one wall and that an electron beam traveling horizontally from the back wall towards the front one is deflected towards the right. What is the direction of the magnetic induction field that exists in the room?

• A. vertically upwards
• B. vertically downwards
• C. horizontal and perpendicular to the direction of
  motion of the electron beam
• D. horizontal and parallel to the direction of motion
  of the electron beam

Answer 1

The correct option is B vertically downwards

The magnetic field has to be vertically downward for bending electron beam towards right