A Level Physics Revision: All of Thermal Physics (in 28 minutues) Part 1

[@jonathoncornly7779]

Wow, your channel has grown so much over the last couple of weeks! (you totally deserve it). On another note, I wanted to ask the purpose of the variable resistor in the experiments above?

[@jonathoncornly7779]

Also I wanted to ask why you wouldn't need a control for the Latent heat of vapourisation experiment?

[@zhelyo_physics]

Thanks a lot! Much appreciated and yes, it has! Pretty awesome! So variable resistor - the purpose is to control the voltage, even if we don't vary it, if it is too high or too low this could cause problems for the experiment. You could also do it with a variable power supply.

[@NhuNguyen-te6lx]

@@zhelyo_physics Do you have any practice questions by topics?

[@zhelyo_physics]

@@NhuNguyen-te6lx loads! Here is a playlist: kzbin.info/www/bejne/pKa3lZWPgZ2LZq8

[@NhuNguyen-te6lx]

@@zhelyo_physics Thank you. Wish you were my physics teacher 😂

[@laeyak6550]

very helpful, ive got a test the day after tomorrow and its pretty make or break for me, I need to get an A rather than a B or I have to go to my secondary university option. These A2 videos are great and actually give me a fighting chance. :) Thankyou very much.

[@zhelyo_physics]

A B is also a great grade, don't put too much pressure on yourself, you got this! Good luck!

[@Bbbbbbbbbbhhhhhhh]

How did it go man?

[@MortonCammar]

yeah damn I was on a similar boat as well

[@elliottcooksey6886]

Hi, for the specific latent heat of fusion practical, why is energy = VI? I thought power = VI? Is it to do with the time? Don’t worry just seen someone else’s comment, keep up the great videos

[@zhelyo_physics]

Yep! There is a typo should be VIT. Thanks and good luck with revision!

[@lukebates7354]

@@zhelyo_physics had me panicking

[@frankivinstutoring3775]

Could you add a little onscreen note into the video to correct mistakes. Mistakes are impossible to avoid, but it could lead to great frustration for students to not correct them.@@zhelyo_physics

[@zhelyo_physics]

great idea! I will see if I can do some in a pinned comment. I always encourage viewers to find some and if they do to drop a comment. If you are in doubt have a quick scroll through the comments and it likely would be addressed if not, let me know and I will have a look at it : ) Funnily enough when I created these videos I had no idea they would become popular! : ) Thanks for your input and for watching.

[@frankivinstutoring3775]

I just don't want learners to come away feeling there is some flaw in their understanding. To be clear, I know there is no possible way to do such great tutorials without typos. I couldn't do half as good a job, so thank you!@@zhelyo_physics

[@ettu2620]

Thanks! This really does help in my first year studies of highschool physics! :)

[@zhelyo_physics]

Anytime! Thanks for the comment!

[@kskeedits]

Hi sir, is it neccessary to mention that the temperature must stay constant in order to get all the marks for a definition question for example what is the latent heat of fusion.

[@zhelyo_physics]

In my experience no, but it can depend on exam board and the number of marks available. I would find some similar questions from your exam board and see how the marks are distributed. Hope this helps!

[@ahnafabrar8490]

Is it useful for A2 Level IGCSE Physics?

[@kausarlolz]

hi sir, thank you so much for this video. by far the best youtube channel for physis revision. just wanted to ask, what exam board would you say has some of the easier a level questions? ocr, aqa or edexcel? thanks

[@zhelyo_physics]

thank you so much for the kind words! Very much appreciated! Sorry but impossible to answer the question, there are easier and harder questions in all exam boards : ) All the best!

[@GambitStunt]

In the specific latent heat of fusion practical you have Energy calculated using VI but isn't energy VIT?

[@zhelyo_physics]

well spotted there should be a "t" in there as E=VIt

[@GambitStunt]

@@zhelyo_physics thank you man u took me from a B to an A* in physics respect

[@joshuaejovi3722]

@@GambitStunt love to see it

[@SorabeeZ]

Absolute temp=P/mc x t y=mx+c analysis suggests that there is no y intercept but in the diagram there is a y intercept, why is this?

[@tahamuhammad5454]

because they used degrees Celsius, if you used kelvin then there would be no y-intercept as at 0 K , energy is 0

[@lawrencedilrukshan5358]

at 25.16 you said that Energy "E" is equal to V times I . which confused me because Energy "E" is actually P times T and Therfore E=VIT ( i am i missing anythink?)

[@zhelyo_physics]

Yep, there is a mistake, E=VIt : ) Thanks!

[@lawrencedilrukshan5358]

@@zhelyo_physics thank you very much for this video sir. . It was very much useful for me to revise. Keep up the good work

[@jasper3033]

Do you have a video covering the first law of thermodynamics?

[@zhelyo_physics]

Yep! kzbin.info/www/bejne/i6TJaZKdnNN7mZI there we go

[@hot_wheels.7]

E is not equal to VI though power is 25:04 So surely you have to multiply it by the time taken to melt?

[@zhelyo_physics]

Yep,it's a typo, mentioned it in other comments.

[@Daniel-gn3yv]

Hi sir, are all the experiments shown in the video apart of the required practical's list for ocr A physics?#

[@zhelyo_physics]

Some are, some are not. Also the required practicals can have variations and additionally they don't appear word for word in exams. I'd focus on the theory and understanding how to perform practicals. Hope this is helpful!

[@Daniel-gn3yv]

@@zhelyo_physicsHi sir, thank you for clearing that up.

[@zarififtekhar]

Sir do you have lessons on the first law of thermodynamics and on alternating currents (rectification & smoothing) ?

[@zhelyo_physics]

Actually, not but I need to make some. Some of my Olympiad Problems apply the first law of thermodynamics to black holes and even the entire universe though: kzbin.info/www/bejne/g3Kzia2BiJmYmqc

[@amirbhatt2915]

Is it best to have calculator in radians or degrees for the exam paper 1 tomorrow as having it in radians messed up my sin and cos calculations?

[@cruf9376]

for circular motion and SHM use radians every other topic should be in degrees

[@udayreddy3705]

hi sir for specific heat capacity experiment what would be the difference if it was solid instead of liquid?

[@zhelyo_physics]

Excellent question, it's exactly the same, the only difference is that there is a liquid surrounded by the insulator.

[@DaemoLannisters]

hey! with respect, is your year 2 A-levels content is suitable for edexcel students?

[@zhelyo_physics]

Absolutely, I would use your syllabus/spec as a checklist. Thanks!

[@Bbbbbbbbbbhhhhhhh]

Can I ask, I thought that specific heat capacity was J kg^-1 k^-1 isn’t that right?

[@zhelyo_physics]

That is correct, in the video I simplify it further to express it as base units.

[@RameenAbbas-fj3og]

Hey, do you have class notes in pdf or something for this?

[@zhelyo_physics]

Sorry only the videos are available

[@fanehamilton2675]

hey at 25:10 you rearrange E/m to VI/m did you mean to put VIt/m, t being time i have never seen E= VI but could just be knowledge gap

[@zhelyo_physics]

Correct, just a typo : )

[@doraemonandchibi]

Hello, is thermocouple and resistance thermometer part of syllabus?

[@zhelyo_physics]

Depends which syllabus you do. I recommend getting the syllabus and ticking off everything as you go along.

[@shanejoy6461]

Hey I'm doing AQA but do we need to know these experiments. For paper 2 or even paper 3?

[@zhelyo_physics]

As always please check with your specification point by point, but pretty much all of this is relevant. I think there is one extra derivation, but please check with your spec as each specification has minor differences.

[@nischaygarg06]

Hey! May i know what tool youre using for the notes?

[@zhelyo_physics]

Sure! I am just using Microsoft Whiteboard, which is free.

[@shebb4828]

thank you sir you're a lifesaver

[@zhelyo_physics]

Happy to help

[@pro0619]

V*I is only the power. Don't you need to multiply the (V*I) with time to get the power?

[@zhelyo_physics]

Yep! It's a typo.

[@cjk244]

Why, at the flat lines at 12:39, is the potential energy increasing?

[@zhelyo_physics]

Yes, PE increases while KE stays constant. Hope this helps!

[@engineeringmadeasy]

If I write all the steps about how to calculate (c) ( the experiment) will I able to get all the marks?

[@zhelyo_physics]

depends on the question, typically they try to put the theory into a new situation and add a twist to the question but as long as you understand the theory and remember the steps, you will be be able to apply them and get the marks : )

[@engineeringmadeasy]

at 25:12, I think you forgot to include time in you the Equation of Energy.

[@zhelyo_physics]

correct! Thanks for mentioning.

[@MarwanNazif]

Hi sir, what is the point of all the variable resistors?

[@zhelyo_physics]

Excellent question, they often appear in exam questions as a way of controlling the p.d. in circuits. In practice, most schools and colleges use a variable power supply for the practicals. In this practical, even if the p.d. is fixed, it's still good to be able to fix it a p.d. we want, e.g. 6V by adjusting the variable resistor. Hope this helps!

[@Dkwksmcmmsmwmwwm]

what exam board is this for

[@zhelyo_physics]

the physics is applicable to all exam boards, I teach OCR A at college but also tutor AQA and Edexcel and familiar with those specs

[@manofsteel6157]

Hi, how come for the practical for specific heat capacity there’s a variable resistor in the circuit? Anyways, great video 😊

[@zhelyo_physics]

The exam board normally uses this as a way to control the voltage. In this experiment we don't really vary the voltage but we need to set it to a value we want and then keep it there. Hope this helps!

[@videoharry_]

Why does potential energy increase during phase transition?

[@zhelyo_physics]

The separation between particles increases. Hope this helps!

[@vegboylokesh7778]

Is this for a specific exam Targeted?

[@zhelyo_physics]

Hi, I teach OCR A however relevant to all exam boards

[@vinigga]

hi, is this cambridge igcse curriculum ??

[@zhelyo_physics]

Hi, nope this is A Level OCR. Very similar to the international A Level. If you are doing GCSEs I have a separate channel for this: kzbin.info/door/yA8wx2hVcPdW2dqXmVNI2Q

[@L4ADI1]

Hi sir, could you explain the difference between electrostatic potential energy and potential energy. I read something that said that a gas a zero electrostatic potential energy becuase there are no electrostatic forces of attraction betwen the particles and i was wondering how this differs from potential energy.

[@zhelyo_physics]

excellent question. Electrostatic potential energy is a form of kinetic energy. A good way of thinking about it is any form of energy that can be coverted to KE, e.g. - positive and negative nucleus some distance apart, the system has the potential for attraction and for the particles to gain speed. Hope this helps!

[@gautammorkhandikar394]

do you have any tips to try and remember these experiments its a lot of information 😂

[@zhelyo_physics]

I would say try to learn them through the understanding of the concepts rather than memorising. E.g. You can only measure V, I and t so you can work out Power, which is energy/time, rearranging for Energy you get PT and then set that equal to mc*delta T and then go from there. You got this!

[@gautammorkhandikar394]

@@zhelyo_physics thank you! your videos are really helpful

[@zhelyo_physics]

@@gautammorkhandikar394 much appreciated!

[@juankerr6621]

Sir I follow AQA exam board, will this video still be good for me?

[@zhelyo_physics]

Absolutely! I am also doing some AQA specific videos now for option ones but the thermal physics one is almost exactly the same though. Still worth double checking and using the AQA spec as a checklist

[@juankerr6621]

@@zhelyo_physics Would you be able to go through AQA past papers this year too? the 1 markers are usually the trickiest because there are no explanations in the mark scheme

[@zhelyo_physics]

thanks for the idea! For sure I will do, stay tuned!

[@studywithyan697]

Book mark for my self: 16:30

[@ProplayerKai]

Turn away from your sins and the things of this world and turn to Jesus, Jesus is the Way, the Truth and the Life

[@ellakay1]

Amen

[@ashanti1449]

We don’t want

[@ashanti1449]

We don’t want

[@saaladd]

Huh