Question

There is an infinitely long wire with conventional electric current flowing to the left. An electron is located just above the wire. What is the direction of magnetic force on the electron that is moving upwards? A) Into the board. B) Out of the board C) To the left D) To the right Up Down G) None of the above Please provide the details of your solution. No credit will be given without a substantiating solution.

Answer 1

The direction can be found out using right hand thumb rule.

First magnetic field direction can be found out. Point thumb of the right hand in the direction of current and curl the fingers. The fingers curl in the direction of the magnetic field.

To find the direction of the magnetic force. Point the fingers of the right hand in the direction of velocity. Curl the fingers in the direction of the magnetic field. Open the thumb. The thumb points the direction of magnetic force.

On following these steps, the direction of magnetic force is to the left.