Motion of Charged Particles

Observing the Force

an electron beam tube can be used to demonstrate the magnetic force on moving charged particles.

Why is the electron moving up??

B is into the page.
Electron current to the left.
If we use Left-hand rule, the Force (motion) must be going down, right??

​You trippin' bro!! We already know that, in the circuit the current is always going from the positive terminal to the negative terminal. So even though the electron moving to the left, the current is moving to the other direction (from right to left).


So the current finger (second finger) must direct to the right.

Magnetic Flux Density + Current Equation = new equation for a charged particle