Question

An electron enters a magnetic field directed to the right, with a velocity toward the bottom of the screen. What is the direction of the force on the electron?

• A. To the left
• B. Into the screen
• C. To the right
• D. Out of the screen

Answer 1

The correct option is B Into the screen

It is given that the direction of the magnetic field is rightwards and the direction of the electron is from top to bottom of the screen hence the direction of the current is from bottom to top of the screen. Now by applying Fleming's left-hand rule, the direction of the force is directed into the screen.