![QUANTUM PHYSICS Lesson 6 [A Level Physics 9702]#exam #cambridge #physics#alevelphysics #education](/img/o.gif)
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@victor8992 Күн бұрын
For q24 why does it not matter that the initial intensity is 0
@heneedsomemilk751 7 сағат бұрын
Read the question carefully it said it was initially 0 but then the 45 degree filter was added in between so now it was not 0
@Apple-bm5im 2 күн бұрын
Sir this was very helpful thank you so much
@learnPHYSICSwithIBM Күн бұрын
Success
@___Bella___-hr3mi 2 күн бұрын
20:50 why isnt the horizontal component used for q10?
@learnPHYSICSwithIBM Күн бұрын
I chose the shortcut. If you consider horizontal momentum you would get same answer. but horizantal and vertical can not be combined here
@ranakhaffaf7391 3 күн бұрын
sir in q31 why did u add 100+50 for the power i dont get it? thank you
@learnPHYSICSwithIBM 2 күн бұрын
yes please. if we say x = 10, and then x increases by 5 then the new x = 15. so if the initial power is p and then it increases by 50% then the increase alone will be 0.5P so the new power is P+0.5P = 1.5P
@ranakhaffaf7391 3 күн бұрын
hi sir in q24 why dont we square the cos20? thank you
@learnPHYSICSwithIBM 2 күн бұрын
the transmitted intensity is not the same as the amplitude. Check out the derivation of malus' law. we resolve the original amplitude to get the new amplitude
@emmanueljombo669 3 күн бұрын
I can't understand what you mean when you say 1st order maximum
@learnPHYSICSwithIBM 2 күн бұрын
maximum means constructive interference occured. first order is the one closest to the the center
@NyxSnowstorm 4 күн бұрын
this was very helpful cuz its almost impossible to solve ppr one without the necessary explanations so these vids are quite the lifesaver.
@learnPHYSICSwithIBM 3 күн бұрын
all the best
@fisherman7834 4 күн бұрын
amazing IBM god bless
@barbie6052 5 күн бұрын
hi, could you please link the tutorials? i'm interested
@Thewethumyo 5 күн бұрын
thx alot
@learnPHYSICSwithIBM 5 күн бұрын
all the best
@moussaousmane747 6 күн бұрын
❤
@pawanpanchal85 7 күн бұрын
at 9:13 if electric field at point p is zero why is the potential there also not zero (since E = V/D); thank you sir for the video
@learnPHYSICSwithIBM 7 күн бұрын
Note that E is a vector yet Vis a scalar. Potential due to positive charge is also positive so we.just add it up. Yet E due to like charges is in opposite directions for each charge so we subtract
@yasermessi1524 8 күн бұрын
sir at 6:28 will i get 2 marks if i only write potential is zero at infinity and gravitational force is attractive? or should i write work is done aswell
@learnPHYSICSwithIBM 8 күн бұрын
It's better to add the part of work done
@Px_nino_x7 9 күн бұрын
Sir seriously your explanations are really good......Thank you for making us understand physics ! Please keep this up becuz this helps alot of students ....Thank you ! ( Reminder plz share the 23 & 24 pprs too )
@learnPHYSICSwithIBM 9 күн бұрын
@@Px_nino_x7 I solved those papers. Check play lists
@learnPHYSICSwithIBM 9 күн бұрын
@Px_nino_x7 or u go to my channel and put in 2023 or 2024 you will see the papers
@rabiasharjeel2020 10 күн бұрын
Dear Teacher, million of thanks to you. your efforts and explanations are so sweet and smashing!!!!!!!!
@learnPHYSICSwithIBM 9 күн бұрын
Ooooh how sweet. Thank you so much. I pray you excel
@rabiasharjeel2020 11 күн бұрын
thanks a lot
@moussaousmane747 11 күн бұрын
Hello sir, thank you so much! Please sir the documents are not downloadable?
@learnPHYSICSwithIBM 11 күн бұрын
which particular one? when you open it there is an option for download
@moussaousmane747 10 күн бұрын
@learnPHYSICSwithIBM All of them sir
@learnPHYSICSwithIBM 9 күн бұрын
@@moussaousmane747 drive.google.com/drive/folders/1uLV6oSDHK8NjyVnQ3tkzHPxpsYYG4iWL?usp=drive_link drive.google.com/file/d/1yza9jhohSCEnhFPEvXGwItMrXolegZ8Z/view?usp=drive_link drive.google.com/file/d/1ChJ3fsVh9eifDaijQidUGbzyYUl4fQya/view?usp=drive_link
@moussaousmane747 9 күн бұрын
@@learnPHYSICSwithIBM thank you so much sir I have downloaded
@yunyd09 11 күн бұрын
Is the syllabus up to date ?
@learnPHYSICSwithIBM 11 күн бұрын
yes
@zzaenabz 16 күн бұрын
Hi there sir, for question 2 (b), (iii), when you were subtracting the area of the triangle and boxes from that of the graph itself, are you also meant to subtract that upper area? Like that mini rectangle above the graph itself above that line you drew because its also a part of the graph? I didn't understand that very well, and I might need help on that question. By chance do you have any video of similar type of kinematic questions where we need to subtract areas and more complex examples? Thank u
@learnPHYSICSwithIBM 15 күн бұрын
@@zzaenabz hello friend, always quote the time in your comment. I subtracted all the area above the curve because I wanted only the area below the curve. You can instead draw shapes below the curve and find the area of the shapes. Or count all the squares below the curve
@zzaenabz 15 күн бұрын
@@learnPHYSICSwithIBM Alright sir, so if I for instance did not draw that horizontal line, I would count all boxes and subtract from the whole area of the grid given, I understand. Thank you so much sir.
@polen7 19 күн бұрын
Mola?
@callumellis7529 19 күн бұрын
Thank you 👍
@learnPHYSICSwithIBM 20 күн бұрын
Not now
@pious.individual 20 күн бұрын
For your MCQ topical compiled papers, is there a pdf that has the answers to the questions?
@CleanSriLanka 23 күн бұрын
It’s a good explanation
@AndItxLakshita 23 күн бұрын
26:17 sir how can we know when to resolve it vertically and when horizontally
@learnPHYSICSwithIBM 23 күн бұрын
think of the quantity you are measuring. its only time which you can consider in any direction. height is vertical, horizontal distance consider horizontal
@learnPHYSICSwithIBM 23 күн бұрын
for more explanation, check in the play lists for lessons of kinematics and go to the last 3 lessons in the play list
@learnPHYSICSwithIBM 24 күн бұрын
The method is what carries marks. Just be positive and focus on the remaining exams.
@annali1278 25 күн бұрын
Sir how many marks will I lose if I wrote change in x over change in y for gradient
@learnPHYSICSwithIBM 25 күн бұрын
@annali1278 that is common but you only lose a mark for interchanging axes but along as you follow next steps there is ecf error carried forward
@annali1278 25 күн бұрын
@@learnPHYSICSwithIBM thanks, sir, I ended up with a negative resistance because of my wrong gradient, but I believe all my methods are correct, will that be penalized,thanks
@learnPHYSICSwithIBM 24 күн бұрын
The method is what carries marks. Just be positive and focus on the remaining exams.
@vinod8june 26 күн бұрын
watch me 00003
@harishmurugesh4217 26 күн бұрын
Hello sir.. sir how many marks will they deduct if in Q1 the dependent and independent variables are switched ? Because it also affects the following steps
@learnPHYSICSwithIBM 26 күн бұрын
You can still get about 13 or 14 marks if you follow your choices carefully. At times u can even get full marks if you did correct graph, gradient which matches your choices
@litask9773 26 күн бұрын
Left with 5 hours till i write the exam and this video has helped me so much thank you
@learnPHYSICSwithIBM 26 күн бұрын
All the best
@learnPHYSICSwithIBM 27 күн бұрын
Yes
@emmanueljombo669 27 күн бұрын
Do u mean total current stays the same when resistors are in series
@gfalco77 27 күн бұрын
Hello sir,what if we measured the e magnetic flux density by calibrating a voltmeter in tesla?
@bredensoh8377 27 күн бұрын
Sir, why u din involve the 10^-5 when u finding c for q2d
@narsingojuvigneshwar 27 күн бұрын
1:12:43 why you didnt multiply by 1000
@The_one_that_got_away 27 күн бұрын
34:32 the area is Inversely proportional to Resistance so shouldnt it INCREASE by 4 times? Thanks for the video!
@learnPHYSICSwithIBM 27 күн бұрын
Its area which increases by factor of 4 so resistance decreases by same factor since they are inversely proportional
@The_one_that_got_away 27 күн бұрын
@@learnPHYSICSwithIBM yes that's absolutely right, my exam is in 10 hours I'm just getting nervous!
@The_one_that_got_away 27 күн бұрын
@@learnPHYSICSwithIBM yes that's absolutely right, my exam is in 10 hours I'm just getting nervous!
@learnPHYSICSwithIBM 27 күн бұрын
U can draw a rectangular thin long object and just name it. But if u studied magnetism you know the shape. However important to just write how it is used in one direction then in the opposite direction and an average value of B is obtained
@atifabbasi-o1b 27 күн бұрын
sir we cant just leave the string hanging right??? shouldnt we draw a clamp on it aswell?? 19:53
@learnPHYSICSwithIBM 27 күн бұрын
I don't think u need a clamp since u will be pulling upwards to cause a force
@ranakhaffaf7391 27 күн бұрын
sir for q3 d from where did u get the uncertainty
@learnPHYSICSwithIBM 27 күн бұрын
gd when you quote time in the comment That is not uncertainty but in finding area when the graph is not a straight line, we can not all get the same answer. So the examiner decides a range in which the answer should fall
@connor__schmitz4619 27 күн бұрын
Do you really need to explain stuff like "I will do this"? Can’t you just give bullet points and listed phrase format for example "•the independent variable is x and defendant variable is y •keep z constant •use (apparatus) to measure (independent variable) •use (apparatus) to measure (dependent variable) •take care for (risk), (e.g.) wear gloves •repeat measurements for (dependent variable) for same (independent variable) and find mean for (depedant variable) Etc?
@learnPHYSICSwithIBM 27 күн бұрын
I teach my students to write a plan, not to point out marking guide points. I encourage students to put them selves in the experiment. The experimental procedure should be workable in the lab. Nevertheless you can bullet your answer the way examiners point out marking points but I can not teach my students such. My students write alot so that the examiner picks out 15 marking points and thus score highly. Thank you.
@connor__schmitz4619 27 күн бұрын
@@learnPHYSICSwithIBM ohh ok I see🙌 but if I wrote in a bulleted way would it be equally fine though? Because I just want to stay on the safe side of things without writing too much (because I’m a slow writer)
@learnPHYSICSwithIBM 27 күн бұрын
@@connor__schmitz4619 well you are free to write in any style as long as you write alot. Because its beter to write about 20 points so you wont be able to know what the examiner will consider as major marking points. the examiner will consider 15 points though which hold more water
@connor__schmitz4619 27 күн бұрын
@@learnPHYSICSwithIBM oh ok thank you I will keep that in mind🙌😁 and for the graph in question 2, could I draw 2 different dotted triangles for each gradient of best fit and worst fit line instead of just 1? And should I state the points that I’ll take from gradient triangle right next to them or on the outside of the graph at the axes?
@learnPHYSICSwithIBM 27 күн бұрын
@@connor__schmitz4619 u can
@KidsLearning-j2m 27 күн бұрын
You should have explained a bit more while answering the questions
@learnPHYSICSwithIBM 27 күн бұрын
Thank you, can you give an example by creating a better channel with gives better explanation. I want to learn from you Sir/madam. Cheers
27 күн бұрын
sir why dont you put 10^-5 for lg T on your counting
@learnPHYSICSwithIBM 27 күн бұрын
power of 10 is in the brackets log(T/10*-5) so the power is catered for in the bracket. I can only consider it when getting antilog. If they had said find lgT with no power of 10 in bracket I would consider it in calculating
@UdomEdetforscience 27 күн бұрын
Excellent
@zzaenabz 28 күн бұрын
sir how to be sure how many decimal places i can out for my answers because they deduct marks if i use wrong number of decimal places. plz make any short video regarding this concern with uncertainty question. thanks
@learnPHYSICSwithIBM 28 күн бұрын
But I did this in this video. Or check out errors and uncertainty in play lists and get the idea fully
@zzaenabz 28 күн бұрын
@@learnPHYSICSwithIBM okay then sir, i will check out the playlist. thank u
@_claymore6705 26 күн бұрын
@@zzaenabz basically in ur when ur writing the formula and substituting the values in that formula, the lowest amount of SFs u get is what ur final answer should have. For example if:- D=25.0( 3 s.f) T=200(1 S.F) Find the speed We do S=D/T WHICH GIVES US 0.125 vbut since the lowest amount of S.F we can write is 1, we write it 0.125 having only one S.F. So the final answer will be 0.1 m/s
@zzaenabz 26 күн бұрын
@@_claymore6705 hi there, thank u sm! my teacher mentioned that ur answer should be to the highest amount of SF. I'm honestly so confused rn.
@7JSINGH 28 күн бұрын
Hi, at 10:59 Why didn't we square the velocity doesn't the formula say v²
@learnPHYSICSwithIBM 28 күн бұрын
watch until i write the final answer. sometimes i make mistakes and correct them later. thank you for watching. cheers
@szrh287 28 күн бұрын
sir do you have marking scheme ? for both paper (AS)
@szrh287 28 күн бұрын
IT SAD TO SAY THAT YOUR MOST OF ANSWER ARE INCORRECT
@TanatswaMbara 29 күн бұрын
10:15 please explain why we used crossectional area of circle
@learnPHYSICSwithIBM 28 күн бұрын
The cross section through a sphere is a circular disc just like the cross section through a cylinder is a circle. Not the différence between surface area and cross section area
@szrh287 29 күн бұрын
(for as)Hi sir ! Appreciate your work can I get p1 (mcqs) all topics in one pdf Like you compile for p2 you got my point I want to print it will be easy for me also do you have notes ??
@szrh287 29 күн бұрын
Hi sir ! Appreciate your work can I get p1 (mcqs) all topics in one pdf Like you compile for p2 you got my point I want to print it will be easy for me also do you have notes ?? (FOR AS )
@learnPHYSICSwithIBM 28 күн бұрын
I have notes but the website has not yet approved them. They are undergoing editing before. They will not be free though 🎉
@szrh287 29 күн бұрын
Hi sir ! Appreciate your work can I get p1 (mcqs) all topics in one pdf Like you compile for p2 you got my point I want to print it will be easy for me also do you have notes ??
@learnPHYSICSwithIBM 28 күн бұрын
It was hard to make it one document. So I decided to maintain it as individual topics but still you can download each topic print and compile into one. The topics are well labelled in their order
@szrh287 28 күн бұрын
@@learnPHYSICSwithIBM UNDERRATED CHANNEL REALLY sir do you have marking scheme ? for both paper (AS)
@learnPHYSICSwithIBM 28 күн бұрын
@@szrh287 just recorded the solutions. Currently typing the solutions but it takes much time so they won't be available very soon.
@szrh287 28 күн бұрын
@@learnPHYSICSwithIBM NO ITS OKAY
@szrh287 28 күн бұрын
IT SAD TO SAY BUT MOST OF YOUR ANSWER ARE WRONG