@@tomf2405 Why would you say that? Both of them helped me a lot for my study and they both are working really hard for students to have a better understanding of physics. I think there's no such thing like who is better than who. Both are really great teachers.
GorillaPhysics - GCSE and A Level Physics Revision - your channel is fantastic too, has been very useful for my younger brother in preparing him for this years A level Physics exams.
I red over the years many many articles about voltages and electric fields but never I understood. However your perfect explanations have cleared the sky above my Head and now and after many years of confusion, I am feeling very good about this subject. And this is what i am concluding with< Competent professor = Success and Thank You So Much for Your Excellent Explanation and Please Teach More because curious people like needs more from you when ever possible.
My exam is tomorrow and you honestly give the best physics explanations I have ever seen! Thank you so much and keep making videos please! Just wondering, I do Edexcel, do you think I will need to use other videos on top of yours in terms of covering the spec?
@@ScienceShorts I actually think the pacing is perfect. I prefer the slower explanation it gives me time to understand the concepts. Although maybe for revision people can speed it up.
For Thermistors/LDRs, the resistance actually increases with temperature. But, the increase in conduction electrons that contribute to the current increase MORE. Overall, we say "resistance decreases"
No. Common misconception - I've even seen teachers make this mistake. Resistance is calculated from a graph by just V/I at that particular point, not the gradient.
The theoretical parts are boring but when you see the practical applications and when you learn about people like Nikola Tesla and many others it gets interesting
Try making an effort, I tend to get frustrated when I don`t understand quickly and electricity isn`t one easy topic. Haha without physics and electricity you wouldn't have been able to watch this video, so yeah its important stuff.
Hello, sir. Thanks a lot for the video. But I have one question. What does the 'direction of voltage' mean? If that's positive, does it mean the electrons are flowing from negative cathode to positive anode?
Oh, and I also couldn't really get why the conventional current flows from positive to negative whilst electrons flow from negative to positive. The electron part quite makes sense for me because electrons are negative so are attracted to positive. But if a current is (rate) of flow of electrons, the current should follow the same rule as electrons... that's how I understood so I couldn't get what u were saying. Could you explain it more in detail, please? Thanks!:)
@@진유-l9p u commented this 3 years ago and have probably figured it out now lol but basically current flows from - to +, therefore electrons also flow from - to +, you are right. But in the past, scientist didn't know that, so they thought that it flows from + to negative, and called it conventional current. Since this doesn't really make a difference to calculations, scientists haven't changed it once they discovered that it was wrong, so current actually flows - to +, but in the exam we need to draw + to - (conventional current). I know its kinda dumb, even my teacher wasnt happy with it but yeah :/
I read up that the current flowing through an ohmic conductor is directly proportional to the potential difference across the ohmic conductor (a resistor) provided the temperature is constant. When they say temperature is constant do they mean the temperature of the surroundings or the temperature of the component. You said resistors heat up so should the IV characteristic of a resistor curve like a filament lamp???? Please reply......
The temp of the resistor changes, but it's designed in such a way that the semi-conducting nature of it balances this out, so resistance is constant. This would be referring to the temp of the surroundings, which will effect how heat is removed from the resistor. Basically, it's a really dumb thing to just throw out there, because it will foster the misconception that a resistor's temp doesn't change with increased current. Bad website.
It is worded a bit differently on the aqa specification from what I wrote but literally this is what it says on the Aqa gcse physics specification page 26...
At 10:10 if a resistor is a semiconductor, then when you increase the voltage you give more energy to the charge carriers, which causes an increase in temperature. But when you increase the temperature you decrease the resistance, so why isn't the graph line falling down when the current or voltage increases? i think I've broken science or my brain is broken.
@4:40 isn't the E.M.F the value that takes into consideration of internal resistance and voltage is the value that doesn't take internal resistance into consideration?
Kodaka x Sena Thats unusual, Kirchoff’s laws are usually extremely easy for everyone. 5 months since u posted this comment so u probably understand it noe
as resistance makes it 'harder' for the current to flow, so the voltage needs to increase to give them more energy to push against the resistance almost. idk what's actually happening in physically in the component in scientific terms lol but i think that's why, i hate electricity. that's also only for ohmic conductors i think? as ohms law is V = IR
can any one HELP ME WITH THIS QUESTION PLEASE a cabel consists of 10 strands of copper wire each of cross-section area 1.1x10^-3 cm^2. Calculate (a) the resistance per meter of the cable (b) the minimum number of strands which would be required if the resistance per meter is not to exceed 0.010ohms. (resistivity of copper = 1.8 x 10^-8 ohm meter.)
Re-uploaded due to mistake!
Science Shorts thank you sir
Hello, I was wondering which exam board do you teach?
Science Shorts can you describe the diode graph
Science shorts can you please make videos on capacitors
It's AQA
Great stuff! Really nicely put together videos, you must spend ages working on these, and great to see how many students stop by to say thanks!
He's better than you LOL!
@@tomf2405 Why would you say that? Both of them helped me a lot for my study and they both are working really hard for students to have a better understanding of physics. I think there's no such thing like who is better than who. Both are really great teachers.
GorillaPhysics - GCSE and A Level Physics Revision - your channel is fantastic too, has been very useful for my younger brother in preparing him for this years A level Physics exams.
Marketing done right mate!
You have a new subscriber.
Loved your videos as a student too thank you!
Its very extremely useful. He does not waste time in talking useless stuff, comes directly to main business and does it very well.
yoyo, just incase anyone is in the new syllabus, (2021-2022) the voltage at which current starts to flow in a diode is now 0.6V
I wish you were my real Physics teacher T_T
+Esperanza pardo D'aww :D
I red over the years many many articles about voltages and electric fields but never I understood. However your perfect explanations have cleared the sky above my Head and now and after many years of confusion, I am feeling very good about this subject. And this is what i am concluding with< Competent professor = Success and Thank You So Much for Your Excellent Explanation and Please Teach More because curious people like needs more from you when ever possible.
i started watching this far too late, i have an electricity test in 40 mins
jokes on you, i’m watching this after my electricity test 😎 (i got a C)
@@piggo5645 well I'm on a d currently so I just hope this test in two hours will change that
@@ethanguest3438 and I hope This helps me for my CIE in 8 Days
@@senanshorts8048 hope you pass, good luck!
@@ethanguest3438 ay thanks man
Your channel is fantastic! They're better than reading off the textbook
Love the videos, you're really saving my physics grades here, cheers!.
Thank you so much, I’ve been so lost in this topic and it’s very helpful to go over the basics
My exam is tomorrow and you honestly give the best physics explanations I have ever seen! Thank you so much and keep making videos please!
Just wondering, I do Edexcel, do you think I will need to use other videos on top of yours in terms of covering the spec?
Mieshal T how did you do
@@smatenygaming5573 that was one year ago (X_X)
@@Romo2055 that was 2 years ago TwT
@@xenmods now its 4 years ago 💀💀💀
now its 5 lol@@Romo2055
this is amazing exactly what I needed thank you so much
Thank you very much for this amazing video. Really helped me get some definitions in my head.
Personally I'd recommend watching this video in 1.25 speed
Soz, my brain doesn't work too fast.
@@ScienceShorts I actually think the pacing is perfect. I prefer the slower explanation it gives me time to understand the concepts. Although maybe for revision people can speed it up.
@battle hardened i see u are a man of culture
It’s dependant on how fast somebody can take in information.
I am watching it at 2x
Bless u forever ur the best person ever IM NOT FAILING ANYMORE
Your the best teacher in life believe me ❤️❤️❤️❤️❤️❤️❤️❤️❤️ and like the songs when you teach please make more videos
For Thermistors/LDRs, the resistance actually increases with temperature. But, the increase in conduction electrons that contribute to the current increase MORE. Overall, we say "resistance decreases"
for v/i = constant graph; is the gradient equal to the resistance
yes
No. Common misconception - I've even seen teachers make this mistake. Resistance is calculated from a graph by just V/I at that particular point, not the gradient.
@@ScienceShorts isn't that the same thing? If the graph is constant?
@@ethanragunathan8757 Yh im not sure about this either
ALL IS WELL
🎉🎉🎉
❤
You have an amazing voice my friend
☹️
bruh i like it :(
I felt this one
The theoretical parts are boring but when you see the practical applications and when you learn about people like Nikola Tesla and many others it gets interesting
Astrophysics or nuclear physics part 2
Try making an effort, I tend to get frustrated when I don`t understand quickly and electricity isn`t one easy topic. Haha without physics and electricity you wouldn't have been able to watch this video, so yeah its important stuff.
This is incredibly helpful! Thank you so much
Do you have a playlist specifically for the Edexcel specification
Very clear and understandable, thank you so much!.
10:32 what do you mean by ohmic at the same temperature. The same temperate of what
Constant temp, I should have said.
Really appreciate your video sir
I'd like more videos with complex questions
Cramming for a couple hours time 😝
YOU ARE THE BEST
Hello, sir. Thanks a lot for the video. But I have one question. What does the 'direction of voltage' mean? If that's positive, does it mean the electrons are flowing from negative cathode to positive anode?
Oh, and I also couldn't really get why the conventional current flows from positive to negative whilst electrons flow from negative to positive. The electron part quite makes sense for me because electrons are negative so are attracted to positive. But if a current is (rate) of flow of electrons, the current should follow the same rule as electrons... that's how I understood so I couldn't get what u were saying. Could you explain it more in detail, please? Thanks!:)
@@진유-l9p 3 years no response :(
@@진유-l9p u commented this 3 years ago and have probably figured it out now lol but basically current flows from - to +, therefore electrons also flow from - to +, you are right. But in the past, scientist didn't know that, so they thought that it flows from + to negative, and called it conventional current. Since this doesn't really make a difference to calculations, scientists haven't changed it once they discovered that it was wrong, so current actually flows - to +, but in the exam we need to draw + to - (conventional current). I know its kinda dumb, even my teacher wasnt happy with it but yeah :/
I read up that the current flowing through an ohmic conductor is directly proportional to the potential difference across the ohmic conductor (a resistor) provided the temperature is constant. When they say temperature is constant do they mean the temperature of the surroundings or the temperature of the component. You said resistors heat up so should the IV characteristic of a resistor curve like a filament lamp???? Please reply......
The temp of the resistor changes, but it's designed in such a way that the semi-conducting nature of it balances this out, so resistance is constant. This would be referring to the temp of the surroundings, which will effect how heat is removed from the resistor. Basically, it's a really dumb thing to just throw out there, because it will foster the misconception that a resistor's temp doesn't change with increased current. Bad website.
It is worded a bit differently on the aqa specification from what I wrote but literally this is what it says on the Aqa gcse physics specification page 26...
They are referring to ambient temperature then. It's a gross oversimplification.
At 10:10 if a resistor is a semiconductor, then when you increase the voltage you give more energy to the charge carriers, which causes an increase in temperature.
But when you increase the temperature you decrease the resistance, so why isn't the graph line falling down when the current or voltage increases?
i think I've broken science or my brain is broken.
Because giving them enough energy to move into the conduction band and be more free to move far outweighs the effect of increased temperature.
conduction band?, Is that on the AQA spec?
I've never heard of it
No, it's not.
Science Shorts ah ok, I won't stress about that then. Thank you so much for still being active to your viewers.
Great channel, keep it up.
great videos sir, These helped me alot
Best explanation
The curve upwards; The resistance is decreasing right, according to the graph?
At 1:40 why isn't the charge -1.6×10¹⁹ because the charge of an electron is negative
wdym
Dear god, why did you use a sharpie!! I got goose bumps from just hearing it run across the paper!
@4:40 isn't the E.M.F the value that takes into consideration of internal resistance and voltage is the value that doesn't take internal resistance into consideration?
Thank you that really helped!
Can you please cover Kirchoff's Law? Most confusing topic for me
Kodaka x Sena Thats unusual, Kirchoff’s laws are usually extremely easy for everyone. 5 months since u posted this comment so u probably understand it noe
How did your A levels go? Are you at Oxford or Cambridge? Life Update?
reply
this is amazing thank you so much!!! :)
what does negative voltage means?
same thing
its vector so voltage going in other direction
Hi can you make a video for semiconductors, valence band, conductors and insulators. Thank youu
Aren't thermistors and LDR cancelled in the new AS cie syllabus?
Plz can you tell me a tip for getting a A in aslevel physic math and computerscience
Irtaza Taak don't give it
Doesn't current flow at about 0.6V for a silicon diode?
Yes, you're correct.
Thanks much 😊
wow um now catching up you are really good thanks
Thank you
Could you please make ultrasound video for A2 level... please
Hi! Have an exam coming up in '25. Is the playlist on your channel applicable to AS level 2025?
Yes
Yes
sir is not the current in y-axis and voltage in x-axis because its I-V graphs calculation
thanks for this video
what is your name? cuz you are the best
please upload solving numerical related to each topic
thanks so much its really helpful
gangbang?
Not the angle we need but the angel we deserve. @ScienceShorts
Thank you so much! This is crazy helpful!
Is EMF really a force?
Electromagnetism is a force, no? Something has to make the electrons move.
So eloquent
Doing Edexcel alevel does this apply to these vids ?
@@formulaint thanks for your help
science shorts can you please make videos on capacitors
can u plz make a video on electric fields as level everything we need to knoW!ASAP??
Do you people even bother checking to see what I've already made?
@@ScienceShorts yes sir!!but you havent pretty much told everything about uniform electric fields
how come voltage increases when resistance increases if resistance takes away energy
as resistance makes it 'harder' for the current to flow, so the voltage needs to increase to give them more energy to push against the resistance almost. idk what's actually happening in physically in the component in scientific terms lol but i think that's why, i hate electricity. that's also only for ohmic conductors i think? as ohms law is V = IR
I'm the 100th comment so Everyone after this stop studying u only once enjoy it
can any one HELP ME WITH THIS QUESTION PLEASE
a cabel consists of 10 strands of copper wire each of cross-section area 1.1x10^-3 cm^2. Calculate (a) the resistance per meter of the cable (b) the minimum number of strands which would be required if the resistance per meter is not to exceed 0.010ohms. (resistivity of copper = 1.8 x 10^-8 ohm meter.)
No
You forgot to add capacitors to this playlist...
Thanks!
6:10
Sora what
itz Arsenal oh lol it was just a time stamp for me to get to the vid later. Sorry about that 😅
от души рахмет
My CIE Physics MCQ AS Level is in 3hrs and I've not started
100k views !!
Finals in 1 hour gang?
is it just me or does he sound a bit like thor? ahhaha
i’m still so lost please help😭
How can i help you ❤
superconductors??????
sorry to be that annoy kid but we were told that is a cell not a battery.
+lee li Nerd.
+lee li (Jokes - you're right :)
great channle gone be so usefull for my A level this year.
It really bugs me that the book definition of ohm's law wasn't given in the video
I've never seen a question asking for that in my 12 years of teaching.
what exam board is this?
+user123 2user123 AQA
Science Shorts I'm on ocr got any ideas will this duff be gerally the same?
user123 2user123 wow ive been revising this thinking its OCR
Am i the only one who thinks he sounds like thor
Both are Australian
Er...
жынды кетти бар го
This is great but physics seriously wtf I am resigning from even trying to understand
Aren't thermistors and LDR cancelled in the new AS cie syllabus?
No