Physics p1 ..wat happened ? :D

[noora]

hey guys i think paper was normal but if we had got extra time it would hav been good some questions were confusing
wat was da answer to electricity ques in which power was distributing i guess they say it was equall resistors rite so it must divide equally

 

[ds29]

it was 2W
Equal resistance yes, but one was in series and the other 2 were in parallel.

 

[HaMMaD_Riar]

wht bout the frequency one.. the loop one .. was tht 2F or F/2 ??

 

[umer khan]

it was 2F
the rubber band one was B cus it was the only one resembling the polymer graph ........... D was the graph for crystals .....

 

[ashhadazam]

well A resembled too -.-

 

[ds29]

I put f/2 and I think that's right.
1 loop = lamda / 2
2 loops = lamda
therefore frequency should become f/2

 

[ashhadazam]

And as far as i remember when we are nearing the Breaking stress a little force produces a greater extension which was only shown by graph A !!!

 

[mzzzz]

na it was 2f
f = v/2L

f1 = v/L = 2 (v/2L) = 2f

 

[ashhadazam]

c = f lamba !
f= c/lambda
lambda with one loop : 2L so frequency becomes.. c/2l
lambda with two loops = l . so frequency becomes c/l which is 2f

 

[mzzzz]

yep 2f it is

 

[ashhadazam]

Wt do u think abt the rubber one .. I hvae searched the whole of internet but i couldnt find the graph similar to the one given in paper.. the one thing i remember is my teacher said that when you start to deform plastically or near the breaking stress a little force produces a greater extension than before so the answer should be A !

 

[mzzzz]

regarding the rubber one
i had graph of metals in mind regarding breaking point
thts y i chose option D
coz it has shape likee this
http://depts.washington.edu/matseed/mse ... ig39-1.gif
m really not sure abt this question
it was confusing

 

[sk8rdude]

On 3 questions i did "Akar Bakar Babmay Bo" thingy..... Including this rubberband wala.. I marked it A.. Hope it is right..

 

[henglin]

i guess molecular spacing increases buh it aint more denser .. hense densitry will decreae and molecular spacing will increase .. whht do u say ?

i dont get it, why does ice flow on water?

 

[henglin]

I put f/2 and I think that's right.
1 loop = lamda / 2
2 loops = lamda
therefore frequency should become f/2

answer is 2f,

the one loop wave has twice the wavelength of the two loop wave, so the one loop have must have half the frequency...

f is half the frequency, answer is 2f

 

[ashhadazam]

ya it was increase increase. which i sadly understood after the paper !!!

And hahaha !!! shukr hai mujay akkar bakkar nai karna para is paper mai !! Chem mai shayad karna paray ! :twisted:

 

[princesszahra]

density decreases
spacing increases

 

[henglin]

yes sorry, density decrease.
which question is the rubber one?
is the the force and extension graph?
for that i think i chose D,

 

[mzzzz]

tht stress-strain graph 1

 

[unknown]

can anyone upload da question paper?
many of u should've been able to get it by now... :?