Physics Paper 1 2011 Discussion Thread

[libra94]

help!!

hope this helps!!

 

[DeathDealer]

Hey guyx cod any1 ans some questionx ?
I'll b postin in a minute

 

[mrpaudel]

plz do post..i will try to answer them!!

 

[mrpaudel]

@deathdealer: where are the questions dude?

 

[Mueez]

http://www.xtremepapers.me/CIE/Internat ... _qp_11.pdf
Q.19 nd Q.30 plzzz

 

[yubakkk]

any one???

 

[mrpaudel]

the answer for this graph is B..jus think urself..R=rho*l/A...and rho is increasing so does l...whereas A is constant..so R is increasing...and I is same there..so Voltage needs to decrease....now jus put the value urself....jus for 1st keep rho and l=1 urself....for 2nd keep 2rho and l=2..do similarly...and judge how its decreasing..!! this is the way u do..this is for easy!!

 

[generalsZH]

NOV 09 (P12)
question 20?????
i approach to 0.10 bt answer is C i.e 0.11.how???

 

[mrpaudel]

0.5fx gives u strain energy..but where u draw it to scale..the line that forms traingle is below that curve..so u shud use ur sense that it must b greater than 0.10J...therefore 0.11J..!!

 

[Ash1994]

http://www.xtremepapers.me/CIE/Internat ... _qp_12.pdf

Q 5 and 9 please!

 

[mrpaudel]

http://www.xtremepapers.me/CIE/International%20A%20And%20AS%20Level/9702%20-%20Physics/9702_s10_qp_12.pdf

Q 5 and 9 please!

8.5 square wave=60ms
or 1 Sw=60/8.5=7.058ms....therefore 7.058*10^-3 seconn...so frequency=1/t= 10^3/7.058=141. 66=140


for 9..its very difficult to reach a answer..but the thing is...gradient of velocity time graph gives acceleration..but while drawing line..jus take the line upto which its straight..!! so identify straight line..and calculate the answer...by y2-y1/x2-x1

 

[Ash1994]

Thanks . .for the first time somebody solved my question in a Thread!
Now. .solve this please
12 Forces of 3 N, 4 N and 5 N act at one point on an object. The angles at which the forces act can
vary.
What is the value of the minimum resultant force of these forces?
A 0
B between 0 and 2 N
C 2 N
D between 2 N and 4 N

 

[DeathDealer]

http://www.xtremepapers.me/CIE/Internat ... _qp_11.pdf

Ques 17 ? Any1 plzzzzzzzzzzzzzzzzzzzzzzzzz

 

[jumana94]

Again @ deathdealer... the answer is C, since the temperature is constant, at 0 degrees, so they both have the same kinetic energy that easy

 

[DeathDealer]

Fank yewh

 

[diwash]

Thanks . .for the first time somebody solved my question in a Thread!
Now. .solve this please
12 Forces of 3 N, 4 N and 5 N act at one point on an object. The angles at which the forces act can
vary.
What is the value of the minimum resultant force of these forces?
A 0
B between 0 and 2 N
C 2 N
D between 2 N and 4 N

the resultant of 4N and 3N is 5N..and the Remaining 5N force can be applied in the opposite diretion to the Resultant fo 4N and 3 N..making the total net force 0N. so the answer is A

 

[bloooooo]

http://www.xtremepapers.me/CIE/Internat ... _qp_11.pdf
plz help me with this oct/nov 2010 guestion no. 34!!!!! URGENTLY

 

[mury456]

every one wire has 0.005 resistance.
Resistance for 800 m for each wire = 800 x 0.005 = 4

total R = 8 ohm
cuz there are two wires

V = IR = 8 x 0.6 = 4.8

total V = 16+4.8= 20.8
so minimum V is C ..

 

[mury456]

please help ~!!!!

 

[msk]

can some one please explain me q10 of June 2009!