PHYS 102 | Magnetic Force on Charged Particles

A demonstration that the force a uniform magnetic field applies to charged particles makes them move in a circle.

[otacilioribeiro]

Damn. That's some real physics right there. I'm learning the theory and the math of eletromagnetism at school, but they don't tell us about the real thing. It's pretty cool to see it. I loved it, thank you

[ZeroInDaHouse]

Very nice demonstration, would have been also very cool to show what happens if you kept increasing the magnetic field. The beam would spiral towards a single point. Fun educational fact would also be that this is how nuclear fusion is being performed by squeezing charged particles to a single point using a strong magnetic field.

[wanglo]

@Physierge
1: if electrons are attracted to the plate, why wouldn't they curve toward and then onto the plate?
2: why wouldn't the electrons that got through get pulled back toward and then onto the plate?
3: why do the electrons stay in a uniform beam instead of immediately being repulsed by one another?
4: why do the electrons go though the plate and behave as though there is no repulsion or attraction?

[nosknut]

This made it click for me. Great demonstration!!

[tejasshenoy]

Some questions regarding the experiment:
1) what would be the velocities of electrons coming out of the electron gun?
2) magnetic field during the perfect circle?

[ashutoshdayal]

Very informative. It's useful for class XII physics.

[JuiceBoxBoiii]

Love the video!
I have a stupid doubt, sir. Why don't the beam of electrons repel each other, because of their like charge? Shouldn't we see many lines of "excited gas" diverging out?
Please help me out.

[RiztaHusniAnanda]

Extremely cool. Thank you very much sir.

[sayyedmaaz]

You really deserve more likes and views

[michaelredenti]

what is the limiting behaviour as you increase the strength of the magnetic field?

[staycalm]

Excellent demonstration. It would have been even better if the room was well lit before the commencement of demo so that the audience can see the setup of equipment. Its great to see the things in action rather than studying theortically from the text book. Overall its superb.

[jackliyong]

Hey Professor, I think if you increase the current of the unionform of magnetic field, or accelerate the charged particle moving speed, the charged particle should do a helix movement.if you can prove this I will apperciate, thanks

[sweet_starshine]

What if you make the magnetic field the opposite charge? Would you still get a circle?

[CHAS]

When the electrons pass through the hole after accelerating towards it, why do they not decelerate after passing through?

[artan]

It apears that direction of beam(decay?) Is locked.
Can you do the same with positron?

[coreyp]

The light we're seeing here is pretty much the same thing as the northern lights, correct?

[vaibhavsharma]

please please demonstrate the helical path of electrons also

[vaibhavsharma]

Sir where do u teach physics, can i contact u by any means?

[AbhayKumar-umvl]

Is uniform magnetic field really possible

[anjanadhalaria]

Here electrons are accelerating so they should emit radiations and should lose energy resulting in decrease in velocity and radius, does this happens