Millikan's Oil Drop Experiment: the Charge of an Electron

[blue3783]

Good job, thanks for the vid :-)

[chizoioioi]

the key to me not getting it when my teacher explained it was that she didn't say the electric ray was negative electrons. that left me wondering how the heck did they become negative

[sondralovesmusic]

Read about this experiment and my prof lectured on it, but I didn't understand it until I watched this video. THANK YOU!

[kekeedme]

@darc1993th You are right to point out that the electric field goes from + to -. But he did not make a mistake because the oil droplets are negatively charged so they tend to go upward. The ionizing radiation hits the gas molecules, they eject electrons and these electrons are captured by the oil drops, giving them a net negative charge. See what I mean?

[zabuzamomochi55]

@kekeedme as the oil drops get nearer to the negative plate, it repels and goes towards the positive plate?

[kekeedme]

@zabuzamomochi55 Yes. So you can adjust the electric field strength to balance gravity pull as well. By the way, are you a Naruto fan lol. I ask because of the username lol. It's a good show

[darc1993th]

I think there's a little bit mistake in your video

the positive plate should be in the bottom one, cause electric field come from positive to negative plates, so the electric force (up) = gravitation (down)

[FPxNoOb]

your*

[FPxNoOb]

Thank you very much!

I actually prefer watching your videos than listening to my teacher eventhough i'm German.

Keep on with the good work. I enjoy watching videos.

max

[ReschJodSchin94]

Thank you from Germany! God bless you!

[AceFrolic720]

The size of the oil droplet depends on the hole (in the plate) through which they fall...

right? So... to get different sized oil droplets, did they like vary the diameter of the hole in the plate, maybe?

[armenbros]

thank you very much.you are far better than our fucking indian skools

[john37309]

Great video. You explained it very well!

Thank you ChemAssistBeta,

John.