Question

An electron enters into the magnetic field and perpendicular to it, as shown in the figure. The direction of the force acting on the electrons will be?

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

Answer 1

The correct option is B

Into the page.

When a conductor carrying current is placed perpendicular to the direction of magnetic field, the force acting on it is given by Fleming’s left-hand rule.

Since, the motion of a positive charge indicates the direction of the current, the direction of current in above case is opposite to that of the electron.

So, according to Fleming's left-hand rule, the direction of the force will be into the page.