Physics p34 05 june 2014

[ZaqZainab]

Like 9702/34/O/N/12 Q2, h ii)

i have no idea

 

[brushna]

Any year whr inclined plane question came in phy ?

variant 34/ Oct/nov 2012 Q.no 2

 

[princeali97]

i have no idea

Aray yar.He was talking about the relationship for example X=kT^2.
So they ask us to find the two values of k first and then whether our results justify the relationship.So we find the %error
%error = diffrence between the two values of k/average of the two values of k multiplied by 100.If its less than 10 then its justified otherwise not.

 

[ZaqZainab]

Aray yar.He was talking about the relationship for example X=kT^2.
So they ask us to find the two values of k first and then whether our results justify the relationship.So we find the %error
%error = diffrence between the two values of k/average of the two values of k multiplied by 100.If its less than 10 then its justified otherwise not.

oh

 

[comrade]

Aray yar.He was talking about the relationship for example X=kT^2.
So they ask us to find the two values of k first and then whether our results justify the relationship.So we find the %error
%error = diffrence between the two values of k/average of the two values of k multiplied by 100.If its less than 10 then its justified otherwise not.

Average? Are you quite sure about it? Why does the book show in the example that it is the smaller value and not the average? I just rechecked.

 

[dumb human]

Average? Are you quite sure about it? Why does the book show in the example that it is the smaller value and not the average? I just rechecked.

Its SMALLER value.

 

[Jelleh Belleh]

To calculate the percentage difference my teacher said it's (k2-k1)/(average) x 100.

Anyone have a link to a Candidates Response booklet so that we can check what the correct formula actually is?

 

[comrade]

Its SMALLER value.

Thank you! I thought my sir told me wrong.

 

[princeali97]

Average? Are you quite sure about it? Why does the book show in the example that it is the smaller value and not the average? I just rechecked.

Yeah i am sure.

 

[comrade]

To calculate the percentage difference my teacher said it's (k2-k1)/(average) x 100.

Anyone have a link to a Candidates Response booklet so that we can check what the correct formula actually is?

In the examiner report it says:
(h) (ii) Candidates from some Centres produced good, clearly reasoned conclusions from their results,
although many calculated the percentage difference between their k values but forgot to state what
criterion they compared this difference to. Weaker candidates just argued that their k values were
‘nearly equal’.

 

[Jelleh Belleh]

https://www.dropbox.com/s/p4gvt356bc548jj/9702_Physics_Standards_Booklet.pdf
Here on page 39, candidate A used (k2-k1)/(k2) x 100, but there was no comment made by the examiner on this.

 

[ChamProzZ]

All the papers I did it was % Difference= [Difference/(AVERAGE K value)] x 100

 

[dumb human]

All the papers I did it was % Difference= [Difference/(AVERAGE K value)] x 100

Ans should we find the DIFFERENCE for Both the values? Or only for one??????????????????????????

 

[Jelleh Belleh]

Could someone tell exactly what we're supposed to write when they ask us to justify the number of significant figures we give for a calculated value?

 

[comrade]

 

[dumb human]

Finally I got something- The chances that this will come is at 90%.

Guess for phy practical.

Q1: pendulum experiment. We will be provided with a S shape hook. We would hang this hook to some support. We would have a V shape wire which we will hang /\ this way with the S shape hook. At the end of the wire we would hang different weights and measure the time for oscillation, make graph and calculate gradient and y intercept and smililar stuff.

Q2: we would be provided a ball and a ramp along with a meter rule and and stop watch. We have to measure time for the ball to reach the end of the inclined plain.

Not sure how much of this is true but this is the most I got. Hope it helps.

AAAAAAAAAAAAAAAAAAAA THANK YOUUUUU
Hope this is what comes!!

But tell exactly what we're supposed to write when they ask us to justify the number of significant figures we give for a calculated value?

 

[comrade]

Could someone tell exactly what we're supposed to write when they ask us to justify the number of significant figures we give for a calculated value?

It depends on the precision available. For example the the balance shows 3 significant numbers like 20.6 g so you have to write according to that. If another reading is 5.9 g you can't write it as 5.90 g. If the balance shows 5.9 g you can't convert to 3 significant figure like 5.90 g. It should be in two significant numbers.

 

[comrade]

AAAAAAAAAAAAAAAAAAAA THANK YOUUUUU
Hope this is what comes!!

But tell exactly what we're supposed to write when they ask us to justify the number of significant figures we give for a calculated value?

Please see my previous reply. It is hard to explain, I tried to explain it as simple as I could. :S

 

[Jelleh Belleh]

It depends on the precision available. For example the the balance shows 3 significant numbers like 20.6 g so you have to write according to that. If another reading is 5.9 g you can't write it as 5.90 g. If the balance shows 5.9 g you can't convert to 3 significant figure like 5.90 g. It should be in two significant numbers.

Please see my previous reply. It is hard to explain, I tried to explain it as simple as I could. :S

Don't worry about it, thank you.

 

[sheetal.gera]

Finally I got something- The chances that this will come is at 90%.

Guess for phy practical.

Q1: pendulum experiment. We will be provided with a S shape hook. We would hang this hook to some support. We would have a V shape wire which we will hang /\ this way with the S shape hook. At the end of the wire we would hang different weights and measure the time for oscillation, make graph and calculate gradient and y-intercept and similar stuff.

Q2: we would be provided a ball and a ramp along with a meter rule and and stop watch. We have to measure time for the ball to reach the end of the inclined plain.

Not sure how much of this is true but this is the most I got. Hope it helps.

in q1 we have to note time for 10 ocsillations per value, right??