Thank you these tips are really useful I have my practical exam tomorrow and my physics teacher is useless, so this is a real help. I have one question though, what exactly are we allowed to ask the supervisor and how many marks may be deducted for asking each question? Like, if I want to check if my circuit is set up right for instance.
In part (f) of the questions shouldn't the units be in SI like metres and amperes or the way this student did with milliampere and centimetre is acceptable?
in the table are we allowed to include values from the frst part and then record 5 more readings or are we not allowed to include the answer from the first part??i would appreciate ur help
thank you very much. i was really confused by this my supervisor said we aren't allowed to include them unless stated but it juz didnt make sense..thanks
our teacher says its 5 cuz when we compare this to the other readings on table of that same column all the reading must have same s.f. so if we have 1.13 as a reading, considering the fact that majority of the readings are 5s.f., then we have to make 1.13 to 5s.f.===>1.1300
I believe you don't need to since they ask it in the second question. Also if you check the mark schemes, the requirement for the gradient mark is that the hypotenuse of the triangle used must be larger than half of the line of best fit, the correct method should be used to calculate the gradient(which is rise/run) and the values which you read off of the graph should be correct. For the y-intercept its a correct read off and the usage of y=mx+c or if your graph starts at x=0 and your line of best fit doesn't go below the axis, then you can directly read it off the graph. So in short, you do not need to write the values for the gradient and the y-intercept.
Specifically plus or minus half a small square in either the y or x direction for the values read off of the graph, as in this is the error youre allowed
Yeah , I used the values you provided for x and y axis but when I plotted it , it was very weird. I apologise if I came across as mean . Just saw something wrong and said it cause everyone makes mistakes
do the sources of uncertainty in the last page question have to be exactly whats in the markscheme or can it be correct if its logical although its not in the markscheme
These videos are great. I have a question, do I have to write the gradient and the y-intercept and write their units? My teacher told me to do so but it doesn't really make sense and in the video, you didn't write them even.
@@flamingninjas7856 if u mean the question with a small equation resembling y=mx+c then yeah this type of question is very common at the end of a graphing question.
@@flamingninjas7856 the answers won't be similar to the other papers' answers. but if u mean that the answer to this type of question will be similar to a previous answer (the one of gradient and intercept) then you'd be right.
anyone please help me out here i have got phy cie tomorrow 1]arent we supposed to give the length in meters and not in cm in the table and same goes for the ampere and not milli ampere 2]do we have to draw table by a pencil or a pen? 3]do we have to draw the triangle for the gradient on the graph??
Drawing a triangle for gradient is important as it scores you one mark. draw the table by a pencil and write your recordings and headings with a pen. writing values in m or cm depends on your experiment if it is required in the question that you record your readings in cm or mA then do, but if not than write readings in m and A
+Chris Gozzard as for units generally it doesn't matter but when you give the units at the very last part of section 1 make sure you use what you measured with.. I would maybe stick with SI units.
Why when plotting the graph has the y-axis reading been reduced to 2 significant figures when it was recorded in three when jotted in the table ?. Also is there is any reason for the gradient and y-intercept being correct to 2 significant figures ?
@@ChrisGozzardThatPhysicsGuy I wanna ask you if examiners have some range of values in the mark scheme . for instance, gradient should be in the range between 2.1-5.3 or like that or something like that .
how many many marks will I loose if I forgot to calculate ib and have used the previous values for six sets although I repeated ia six time and changed x as well
When stating our measurement values should we write it to it's smallest graduation or half of that? For example a meter rule has a graduation of 0.1cm so should we write our answers as 35.5cm or 35.50cm? Thanks in advance.
Hi there. No as the student marked to outlier. I've spoken with the examiner about this who said they can get one and as long as it is marked its fine.
Philanthropist but tomorrow is my As practical and everybody is saying q1 is capacitor related but i never did any capacitor related question in school and im worried
i dont really know i am completely blank in practicals, i mean i guess anything about any topic would be very helpful and appreciated, maybe a video summarizing all the main concepts related to practical, like just a quick revision video? and also please make more videos solving past paper questions of paper 2 and 1, i find those videos very helpful since i have a hard time solving past papers but your videos helped.
nope, voltage is independent of the current that flows, it is, in fact, the opposite, the larger the potential difference between two points, the larger the current flows, the resistance of skin also plays a role on whether u feel it or not (that's why u feel electricity at your tongue easier)
The units from the last column of the table are wrong it's supposed to be m^-1A^-1. Also, the six sets of values of w are supposed to be in order, ranging from the smallest to the biggest, meaning 10.2 cm was supposed to be on the first row. Also, the units on the table are supposed to be in SI units, not mA or cm,rather A and m.
![I.N "HALLUCINATION" | [Stray Kids : SKZ-PLAYER]](http://i.ytimg.com/vi/n5B5q1Hwt_U/mqdefault.jpg)
nobody gonna talk about how the student achieved full 20 marks?
it's easy
Exactlyyyyyyy
Also the fact that the work is really, really neat. If only my tables were half as good...
nah fuck him XD
It's not hard to get 40 on this paper
your videos saved my a levels. thank you so much for your effort
Their work is so satisfyingly neat!!
☺
2:40 "The smallest value was 10 and the greatest was 100 so thats approximately a range of 70" Mhmm
That doesn’t seem right does it?
i came looking for this comment lol
Hmm
Thank you these tips are really useful I have my practical exam tomorrow and my physics teacher is useless, so this is a real help. I have one question though, what exactly are we allowed to ask the supervisor and how many marks may be deducted for asking each question? Like, if I want to check if my circuit is set up right for instance.
They can only help you with Physically setting up the exam and nothing about the paper.
Hi Mr gozzard, I hope you are well . Your teaching is still the best , using this for the June examinations. Much love from reddam house 🙏
In part (f) of the questions shouldn't the units be in SI like metres and amperes or the way this student did with milliampere and centimetre is acceptable?
I don't think cie minds
Paper 3 tomorrow and I'm so nervous aaaaa
Good luck!!
Is this applicable for CIE AS Level Paper 3?
I think so.
Yeap it is..
Can i take the ampare value only in ampare and not in mA
in the table are we allowed to include values from the frst part and then record 5 more readings or are we not allowed to include the answer from the first part??i would appreciate ur help
some1 frm somewhere yes you are.
thank you very much. i was really confused by this my supervisor said we aren't allowed to include them unless stated but it juz didnt make sense..thanks
is 0.0912 to 3s.f or is it to 5s.f when considered as a reading in a table??? pls reply ASAP
I think 3 s.f.
our teacher says its 5 cuz when we compare this to the other readings on table of that same column all the reading must have same s.f. so if we have 1.13 as a reading, considering the fact that majority of the readings are 5s.f., then we have to make 1.13 to 5s.f.===>1.1300
Sir units of grad and y intercept are not written hence wouldn't that result in deduction of markss
No. I think they are only required on the final page of question 1.
do you need to write a unit for the gradient and the y-intercept?
I believe you don't need to since they ask it in the second question. Also if you check the mark schemes, the requirement for the gradient mark is that the hypotenuse of the triangle used must be larger than half of the line of best fit, the correct method should be used to calculate the gradient(which is rise/run) and the values which you read off of the graph should be correct.
For the y-intercept its a correct read off and the usage of y=mx+c or if your graph starts at x=0 and your line of best fit doesn't go below the axis, then you can directly read it off the graph.
So in short, you do not need to write the values for the gradient and the y-intercept.
Specifically plus or minus half a small square in either the y or x direction for the values read off of the graph, as in this is the error youre allowed
my teacher said that we are also supposed to write the units with the calculated gradient and y-intercept. Is that the case?
Well better safe than sorry
@@ChrisGozzardThatPhysicsGuy Sure thanks!
the values are wrong . I have tried to plot it but it is not fitting i the graph
Oh.. Sure?
Yeah , I used the values you provided for x and y axis but when I plotted it , it was very weird. I apologise if I came across as mean . Just saw something wrong and said it cause everyone makes mistakes
do the sources of uncertainty in the last page question have to be exactly whats in the markscheme or can it be correct if its logical although its not in the markscheme
I think they are pretty flexible.
@@ChrisGozzardThatPhysicsGuy which means it doesnt alwayshave to be whats in the markscheme ?
@@linaabdelshafy6524 yes
These videos are great. I have a question, do I have to write the gradient and the y-intercept and write their units? My teacher told me to do so but it doesn't really make sense and in the video, you didn't write them even.
gradient and y intercept dont really have units. The y intercept is a point and the gradient is just the coefficient of x
@@MyCheeseHurts hey are the answers of the last 2 questions always the same ?
@@flamingninjas7856 if u mean the question with a small equation resembling y=mx+c then yeah this type of question is very common at the end of a graphing question.
@@MyCheeseHurts oh ok, so the answer would be same for most of them right?
@@flamingninjas7856 the answers won't be similar to the other papers' answers. but if u mean that the answer to this type of question will be similar to a previous answer (the one of gradient and intercept) then you'd be right.
are you allowed to ask the supervisor for help if you really cant figure out the whole circuit at all?
lidia palha yes but you may lose up to two marks.
what if you complete the circuit by your self but u ask the supervisor if its correctly connected??? would you still loose marks?
as he said in the video it depends on cie when the get your supervisors report
the table(recording values) should be done in pen right?
😊
Are we not supposed to give gradient and y-intercept units?
😁
do we have to state the unit for gradient because in some mark schemes they require the candidates to write the units
fily theresia yes do
There r no units for gradient becuz its a ratio i think
this is too late but for future readers, gradient can have a unit.
like how in a speed-time graph the gradient is acceleration
Yes the gradient is delta Y/delta X, so the unit is Y/X
-wheres the units in the graph?
- Also dont you have to take average for the first reading?
🎀
anyone please help me out here i have got phy cie tomorrow
1]arent we supposed to give the length in meters and not in cm in the table and same goes for the ampere and not milli ampere
2]do we have to draw table by a pencil or a pen?
3]do we have to draw the triangle for the gradient on the graph??
Drawing a triangle for gradient is important as it scores you one mark. draw the table by a pencil and write your recordings and headings with a pen. writing values in m or cm depends on your experiment if it is required in the question that you record your readings in cm or mA then do, but if not than write readings in m and A
Thank you.and can we write (10^-3) with the si unit if the quantity has several decimal place in the column heading?
yes of course thats how we deal with numbers that are too small or too big
+The Gladiator the triangle must be in the graph.. At least half the length of your line of best fit.
+Chris Gozzard as for units generally it doesn't matter but when you give the units at the very last part of section 1 make sure you use what you measured with.. I would maybe stick with SI units.
Do I have to draw the triangle to find the gradient?
😋
Is it necessary to start graph from (0,0) to calculate Y-intercept?
No.. Just use y=mx+c
in what sf should i give my ans if am to find values of M ,N ?
The same or one more sf than used to calculate your values.
Why when plotting the graph has the y-axis reading been reduced to 2 significant figures when it was recorded in three when jotted in the table ?. Also is there is any reason for the gradient and y-intercept being correct to 2 significant figures ?
Also are there any rules for when to use scientific notation specially
You can use the same number of sigfigs or one more than the least number of sig figs used in any of the variables used to get the answer.
OK thanks !
How did he achieve 20 marks and the exam is out of 40? Plz explain
Just part one here... Like the title says
@@ChrisGozzardThatPhysicsGuy oh okay thanks it's my first time taking physics AS so yeah
2:45, 100 - 10 = 90 not 70
oh yeap.. well spotted.. simple slip. All apologies.
what if we manipulate the values? Can examiners find out?
I guess if they read your mind.. CIE is interested in your skills
@@ChrisGozzardThatPhysicsGuy I wanna ask you if examiners have some range of values in the mark scheme . for instance, gradient should be in the range between 2.1-5.3 or like that or something like that .
can i put the readings in m for w and mA for the current??
And also, why is the unit for (Ia+Ib)/IaIb) in mA^-1?
mA/(mA*mA)
mA/(mA)^2
=1/mA
🙂
what to you use to clean alligator clips with?
lidia palha wire wool or sand paper would do.
Chris Gozzard do they provide us with that?
@@talal1458 they dont, rip
can i leave my readings in mA and cm? i do not have to change them to base units?
B N as long as you give your final answer in the same units then yes you will be fine.
wheres part 2 ?
😊😊😊😊
how many many marks will I loose if I forgot to calculate ib and have used the previous values for six sets although I repeated ia six time and changed x as well
He didn"t write the uncertainty in his readings?.Is it okay?.
I don't think they require uncertainty for question 1
Yeap
When stating our measurement values should we write it to it's smallest graduation or half of that? For example a meter rule has a graduation of 0.1cm so should we write our answers as 35.5cm or 35.50cm? Thanks in advance.
35.5 as adding the extra sig. Fig. Implies that your metre stick could read to a tenth of a mm, which is not true.
Thanks a lot.
I am so glad I found this channel
Me too!
hello sir can you help in cie A2 paper4?
Yes. Why? Whats up?
Where is Ia measured?
😃
Do we really need to write units in gradient?
doesn't harm..
I can see that the person who did the practical got an outlier in his/her values. Should the latter not be penalised for that?
Hi there. No as the student marked to outlier. I've spoken with the examiner about this who said they can get one and as long as it is marked its fine.
Chris Gozzard Oh okay thanks. By the way, this video is very helpful to me. Do you have other videos like this one?
Ker sley yes many. consider subscribing to my channel.
Why does the range of W be over 60cm?
Set by the memo... use the greatest range of the equipment that is given to you.
Ok ic.... thank you
I noticed the student didn't use any calculations for the last part and used the previous answers... Can we do that?
Yes.
How did you find the practical?
Why is the range spread over like this? Why is it not constant like 10 20 30?
You need to use the full range of your equipment.
Chris Gozzard even if the range itself is not linearly increasing?
yeap.. doesn't need to be linear just evenly spaced.
sir is capacitor included in As practicals
Usually no.
Philanthropist but tomorrow is my As practical and everybody is saying q1 is capacitor related but i never did any capacitor related question in school and im worried
Hmmm... there has been a capacitor prac in the past but you didn't need to to know what the device was. Just take some Physical measurements of it.
Chris Gozzard i hope its like they same i think ur talking about mayjune 16 qp 34..
yeah.. thats the paper.. I remember soldering all the LEDs and resistors together.. :)
hi
im private condidate
and I really need help
please tell me where is question paper of this video???
where can I find this paper?
From papacambridge
Thank you so much for the video and your effort! I found this really healpful
💥
2:40 You made a mistake there.
Other than that great video helped a lot👌
Oh?
if u look very carefully, there are many mistakes
How?
@@ChrisGozzardThatPhysicsGuy u missed the signifikant fugures in the table why is the last value in 4 signifikant figures
@@justaviewer904 where?
@@justaviewer904 0.0394 three not four
@@ChrisGozzardThatPhysicsGuy in the table, fourth column and fourth row all the calues
I dont understand one thing. (IA+IB)/IAIB how does this have a unit? Its a ratio so top ampere will cancel bottom ampere.
The top part of the equation has the unit of ampa but the bottom is amps x amps... whuch is amps squared.
Thank you, sir.
How did it go?
What values we must use of x and y in the formula of
Y=mx+c
Use any x and corresponding y value from your line of best fit but do not use one of your plotted points.
PLZZZ do part 2
Super busy at the moment.. will try but hold on please
Thank you so much, amazing
will you be doing more before may?
Yes. Any requests for topics?
i dont really know i am completely blank in practicals, i mean i guess anything about any topic would be very helpful and appreciated, maybe a video summarizing all the main concepts related to practical, like just a quick revision video? and also please make more videos solving past paper questions of paper 2 and 1, i find those videos very helpful since i have a hard time solving past papers but your videos helped.
you are saving my a levels honestly
Wouldn't anything above 10mA deliver a painful shock?
hmm.. voltage shocks current kills.. :)
actually both work together to shock and kill, you cant gain enough voltage without current and vice versa
nope, voltage is independent of the current that flows, it is, in fact, the opposite, the larger the potential difference between two points, the larger the current flows, the resistance of skin also plays a role on whether u feel it or not (that's why u feel electricity at your tongue easier)
The units from the last column of the table are wrong it's supposed to be m^-1A^-1. Also, the six sets of values of w are supposed to be in order, ranging from the smallest to the biggest, meaning 10.2 cm was supposed to be on the first row. Also, the units on the table are supposed to be in SI units, not mA or cm,rather A and m.
Nope.. not ment to be in order.. doesn't gave to be SI units. Look at every memo..
can u please do part 2 soon
B N this student only wrote part 1. I need to find a good part 2 then I will do.
They write hella small
😄
are the answers of the last 2 questions same?
😊
wheres part 2 ?
😊😊😊😊