Discovery of the Electron & Oil Drop - A-level Physics (Turning Points)

00:00 Cathode rays & thermionic emission
04:08 Electron undeflected by electric and magnetic fields
06:16 Electron in magnetic field
08:30 Electron between charged plates
12:26 Milikan's Oil Drop Experiment -
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[alanfaraj]

what the hell? why aren't you more famous, this literally is free education and you sir are a hero. Thank you

[acboy]

I love the way you taught us a flawless method of working something out then followed it up with "its a bit redundant" got to love that

[MrTVx]

I understand all the physics but not how to answer the questions.

[hi]

Welp, time to start revision for paper 3 hehe

[jphamspam]

I'd love to see how much of a spike in views you get during exam time

[jacobh]

I switched off like 3 minutes in, God help me with the exam on monday

[katepatoot]

THANK YOU THANK YOU THANK YOU IM SO SCARED ABOUT TOMORROW I COULDNT STOP CRYING NOW I CAN RELAX XX

[eranarkin]

Great video but the turning points text book from AQA says the droplets in Millikan's were charged negatively by X-Rays and also shows the plates in opposite orientation to what you've written. Makes sense since electrons are negatively charged

[rohanbhalla]

Incredible channel
Specially videos on magnetic fields

[bewgamings]

What? me? I would never be doing last minute cramming for paper 3 tomorrow.










I did this to myself

[lightx_]

i don't even do turning points for my extra module but i like your vids lol

[adityamisra]

Now I got my exams in 1 hour and 20 mins

[georgebrash]

Could you make some videos for the AQA astrophysics module?

[goldybindra]

12:57 you said that oil drops were positively charged, but shouldn't they be negatively charged to find the charge of the electron?

[DestinyVideosHD]

5:01 can someone help, I don't get why the force is downwards, because isn't the current flowing from + to minus so from top to bottom. So I get the force to be moving rightwards, obviously just looking logically you can tell it goes downwards but using flemings left hand rule I don't get how you'd get the force to be downwards. Thanks.

[kiransteward]

At 12:10, you said they compared the specific charge with a Hydrogen ion, which is a proton which surely wouldn't have been possible if they thought the atom was spherical and indivisable.

[peterblack]

is the idea of thermionic emission also linked to ionising atoms in the gas? Thanks

[michaellinton]

I'm a bit confused about the force due to the magnetic field. Would the force due to the magnetic field not be in the up-ward direction in the first example?

[star-slwv]

do we need to know this indepth for ocr physics

[abitappenden]

Would you consider doing videos on the other optional models for AQA like Astrophysics?