Physics: Post your doubts here!

[amina1300]

how do u rate the paper?
was it easy or hard?

I havent actually done alot of practicals but I guess it was easy for most people because they werent any electircity questions.

 

[anastasia grey113]

I havent actually done alot of practicals but I guess it was easy for most people because they werent any electircity questions.

lol i wouldve been happier if it had been electricity
what was ur acceleration btw?

 

[amina1300]

The sensitivity of a meter rule is 1mm, the possible error being half the sensitivity is±0.5mm. Percentage uncertainty is equal to your (possible error/recorded measurement)x100, this varies depending on the magnitude of your measurement.
https://www.thestudentroom.co.uk/showthread.php?t=887931

Confused.

 

[anastasia grey113]

Confused.

ikr its confusing
i also used to think it was 1mm until a friend said it was 0.5mm :/

 

[amina1300]

lol i wouldve been happier if it had been electricity
what was ur acceleration btw?

I got it in cm s-2 was it supposed to be in ms-2 I had no time so i used cm..?

 

[anastasia grey113]

I got it in cm s-2 was it supposed to be in ms-2 I had no time so i used cm..?

it depends
if u used 3.2cm than write cms-2
if u used 0.032m like i did write ms-2

 

[amina1300]

Did you have negative values thought out the exam-paper?

 

[anastasia grey113]

Did you have negative values thought out the exam-paper?

nope but my friend did
u?

 

[sarmadimran]

If we get incorrect readings in question1( mine all were in the range 1.2-1.24) then all the other parts of the question will be incorrect....so how many marks will be deducted?

 

[amina1300]

If we get incorrect readings in question1( mine all were in the range 1.2-1.24) then all the other parts of the question will be incorrect....so how many marks will be deducted?

The oscillations Question?

 

[sarmadimran]

The oscillations Question?

Yup

 

[sarmadimran]

What was 1.2 ? the clip reading?

Time period my all times were in the range 1.2-1.24 that were wrong so how many will be deducted?

 

[anastasia grey113]

If we get incorrect readings in question1( mine all were in the range 1.2-1.24) then all the other parts of the question will be incorrect....so how many marks will be deducted?

i think itll cost one mark only
you should review the syllabus for paper 3
theres only one mark for quality of collected data n accurate results

the rest by which i mean the graph intercepts gradients n all will be checked according to your readings only on your readings only

if you made a neatly ruled table with the correct headings n units n repeats n all n if your range was like 2,4,6,8,10,12 or 4,6,8,10,12,14 then u r good to go

 

[selrey]

If I get an A in p1 n p2, and a C in p3 in phy what will be my overall grade? Like ik p3 was quite easy. Like the exp were easy to perform but i did some silly mistakes like i didnt take the max range n i wrote the time n gradient to wrong sig fig n i did write the right units in gravity question n ofc i couldnt write the errors n imp n ughh much more

 

[anastasia grey113]

If I get an A in p1 n p2, and a C in p3 in phy what will be my overall grade? Like ik p3 was quite easy. Like the exp were easy to perform but i did some silly mistakes like i didnt take the max range n i wrote the time n gradient to wrong sig fig n i did write the right units in gravity question n ofc i couldnt write the errors n imp n ughh much more

my friend had this in bio n she got an A
but it may only b possible if u have like a very high in the other 2 papers
also p3 only has a wieghtage of 23% so their may be a good chance as well
but then again, it may be a little difficult to turn that grade into A* in A2

 

[selrey]

my friend had this in bio n she got an A
but it may only b possible if u have like a very high in the other 2 papers
also p3 only has a wieghtage of 23% so their may be a good chance as well
but then again, it may be a little difficult to turn that grade into A* in A2

Ya Allah I'm so stressed

 

[sarmadimran]

My value of g was around 500 which is vv wrong due to incorrect readings taken still 1 mark will be deducted?

 

[amina1300]

If I get an A in p1 n p2, and a C in p3 in phy what will be my overall grade? Like ik p3 was quite easy. Like the exp were easy to perform but i did some silly mistakes like i didnt take the max range n i wrote the time n gradient to wrong sig fig n i did write the right units in gravity question n ofc i couldnt write the errors n imp n ughh much more

People get 2 As and an E in p3 but still manage to get an A so ..dw so much.

 

[Zaki ali asghar]

Guys for Q.2 its not possible that you use absolute uncertainty in calculating % uncertainty because the method of performing experiment is inaccurate the uncertainty will always be higher than the 1 mm which is for metre rule,i went through many markschemes before paper and there was a range of example 2-7 mm you could choose as absolute uncertainty to calculate %uncertainty afterwards

 

[Zaki ali asghar]

Mine practical was alright,i wrote the following errors,Two readings no enough to draw valid conclusion,the loop over rod keeps sliding,the rule balances only for a short time so difficult to note the exact lenght at which it balanced and the value of masses provided maynot be accurate.