uniform magnetic field is from west to east,electrons enter from north to south,so what is the direction of force acting on electron?
To determine the direction of the force acting on an electron in a uniform magnetic field, you can use the right-hand rule (also known as the Fleming's left-hand rule). Here's how you can do it:
1. Extend your thumb, forefinger, and middle finger of your right hand perpendicular to each other so that they form a three-way orthogonal system.
2. Point your forefinger in the direction of the magnetic field, which is from west to east in this case.
3. Point your middle finger in the direction of the velocity of electrons, which is from north to south as stated in the question.
4. Your thumb will then indicate the direction of the force acting on the electron.
In this scenario, if you follow these steps, you will find that the force will act towards the west.
So, the direction of the force acting on the electron will be towards the west.