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Author Topic: ALL CIE PHYSICS DOUBTS HERE !!!  (Read 174069 times)

Offline haris94

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Re: ALL CIE PHYSICS DOUBTS HERE !!!
« Reply #1020 on: April 11, 2012, 11:03:30 pm »
Quote from: SkyPilotage on April 11, 2012, 10:01:57 pm

2- They wouldnt have given you the value, never seen CIE do sth like that from year 2000 Examinations :P
What do you think?


Valid point.
I may have overthought this a bit too much. Thanks  :P
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WHAT WE DO IN LIFE ECHOES AN ETERNITY

Offline SkyPilotage

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Re: ALL CIE PHYSICS DOUBTS HERE !!!
« Reply #1021 on: April 11, 2012, 11:13:55 pm »
yup, tell me abt it! I hate it when I do that :P
mess up all the easy questions and solve the hard ones fluently :D
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galaxy

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Re: ALL CIE PHYSICS DOUBTS HERE !!!
« Reply #1022 on: April 12, 2012, 05:52:58 pm »
Assalamoalaikum wr wb!

I need help with Q:7 a of June 05 Paper 4...plz

and also Q:6 bof the same paper

JazakAllah
« Last Edit: April 12, 2012, 05:59:10 pm by galaxy »
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Offline Most UniQue™

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Re: ALL CIE PHYSICS DOUBTS HERE !!!
« Reply #1023 on: April 12, 2012, 08:15:11 pm »
Quote from: Rvel Zahid on April 10, 2012, 11:12:49 am
ok thanks a bunch.
some more. attached the files below. take ur time not urgent. Thankyou. :)



Attachment 11.JPG:

I= Q/T

Q=ne

Therefore I= N(e)/t => I/e = N/t

Since rate of flow = N/t , I/e = N/t

Rate of flow = I/e

Rate of flow = 4.8/ 1.6x10^-19 = 3.0 x 10^-19 s^-1

Electrons flow from negative to positive terminal so there flow of electron is in the direction Y to X

Answer = C

-----------------------------------------------------------------------------------------------------------

Attachment 5.JPG

Anticlockwise moment = Clockwise moment

10 x 0.6 + 100 x 0.1 = 20 x 0.4 + 20 x d

d = 0.4 m from pivot so answer is D

-----------------------------------------------------------------------------------------------------------

Will solve the others later...
« Last Edit: April 12, 2012, 08:17:55 pm by Muscle NerD™ »
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Offline Rvel Zahid

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Re: ALL CIE PHYSICS DOUBTS HERE !!!
« Reply #1024 on: April 13, 2012, 08:36:34 am »
Quote from: Muscle NerD™ on April 12, 2012, 08:15:11 pm
Attachment 11.JPG:

I= Q/T

Q=ne

Therefore I= N(e)/t => I/e = N/t

Since rate of flow = N/t , I/e = N/t

Rate of flow = I/e

Rate of flow = 4.8/ 1.6x10^-19 = 3.0 x 10^-19 s^-1

Electrons flow from negative to positive terminal so there flow of electron is in the direction Y to X

Answer = C

-----------------------------------------------------------------------------------------------------------

Attachment 5.JPG

Anticlockwise moment = Clockwise moment

10 x 0.6 + 100 x 0.1 = 20 x 0.4 + 20 x d

d = 0.4 m from pivot so answer is D

-----------------------------------------------------------------------------------------------------------

Will solve the others later...

Thankyou so much Muscle Nerd :)
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Offline mathy

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Re: ALL CIE PHYSICS DOUBTS HERE !!!
« Reply #1025 on: April 13, 2012, 08:45:32 am »
Assalamoalaikum wr wb!

Quote from: galaxy on April 12, 2012, 05:52:58 pm

I need help with Q:7 a of June 05 Paper 4...plz

and also Q:6 b of the same paper

JazakAllah
anyone ?
also Q:6a i of june 06
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Offline SkyPilotage

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Re: ALL CIE PHYSICS DOUBTS HERE !!!
« Reply #1026 on: April 13, 2012, 07:36:52 pm »
Quote from: galaxy on April 12, 2012, 05:52:58 pm
Assalamoalaikum wr wb!

I need help with Q:7 a of June 05 Paper 4...plz

and also Q:6 bof the same paper

JazakAllah

Wealykumoessalam warahmatullah webarakatuh.

Q7 a) in attachement.
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Offline SkyPilotage

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Re: ALL CIE PHYSICS DOUBTS HERE !!!
« Reply #1027 on: April 13, 2012, 07:43:59 pm »
Quote from: SkyPilotage on April 13, 2012, 07:36:52 pm
Wealykumoessalam warahmatullah webarakatuh.

Q7 a) in attachement.

Q6 b)
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Offline SkyPilotage

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Re: ALL CIE PHYSICS DOUBTS HERE !!!
« Reply #1028 on: April 14, 2012, 09:23:58 am »
Quote from: mathy on April 13, 2012, 08:45:32 am
Assalamoalaikum wr wb!
anyone ?
also Q:6a i of june 06

Q6a J06
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Offline mathy

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Re: ALL CIE PHYSICS DOUBTS HERE !!!
« Reply #1029 on: April 14, 2012, 09:45:43 am »
jazakAllah khairen!!!!!!!!!!!

ok can u please explain me the reason for Q6 b)..why is the first (top one)  like that? what;s the relation ship to be used?

and for 6 a for j06y, wud u plz explain, me the direction of B....like how did u get it downwards?

By the way Thanks a lot!!!!!!! it helped me...:)

P.S. I tried quoting the post but was unable to do..?! i dunno y?? :s
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Offline SkyPilotage

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Re: ALL CIE PHYSICS DOUBTS HERE !!!
« Reply #1030 on: April 14, 2012, 10:12:46 am »
Quote from: mathy on April 14, 2012, 09:45:43 am
jazakAllah khairen!!!!!!!!!!!

ok can u please explain me the reason for Q6 b)..why is the first (top one)  like that? what;s the relation ship to be used?

and for 6 a for j06y, wud u plz explain, me the direction of B....like how did u get it downwards?

By the way Thanks a lot!!!!!!! it helped me...:)

P.S. I tried quoting the post but was unable to do..?! i dunno y?? :s

June 2005
 Question 6 B)
I)   Magnetic Flux is proportional to the change in current so its the same as the current graph given in the question.                
II)  The e.m.f is the negative of the gradient of the magnetic flux graph by Faraday Lenz Law that Emf= - N(flux)/time so it is the negative of the rate of change of flux. So when the graph of Phi is steepest, emf is maximum

June 2006
 Question 6 A)
The magnetic field around point Y due to XY is circular, Therefore at Point Q, the direction of the magnitic field is tangential to the magnetic field at Y. Which is downwards.

Hope it helped you, brother!

--------If you need to quote, just click quote which is at the top right of that post. Then you can type what you want under it :)-------------

 
« Last Edit: April 14, 2012, 10:16:11 am by SkyPilotage »
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Offline mathy

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Re: ALL CIE PHYSICS DOUBTS HERE !!!
« Reply #1031 on: April 14, 2012, 08:44:25 pm »
Quote from: SkyPilotage on April 14, 2012, 10:12:46 am
June 2005
 Question 6 B)
I)   Magnetic Flux is proportional to the change in current so its the same as the current graph given in the question.                 
II)  The e.m.f is the negative of the gradient of the magnetic flux graph by Faraday Lenz Law that Emf= - N(flux)/time so it is the negative of the rate of change of flux. So when the graph of Phi is steepest, emf is maximum

June 2006
 Question 6 A)
The magnetic field around point Y due to XY is circular, Therefore at Point Q, the direction of the magnitic field is tangential to the magnetic field at Y. Which is downwards.

Hope it helped you, brother!

--------If you need to quote, just click quote which is at the top right of that post. Then you can type what you want under it :)-------------

 
It definitely did... :) JazakAllah khairen!! :)
thanks a lott!!!!!!

and By the way I did know how to quote..I guess, I had the quick reply feature on, bcoz of which that wasn't working, I turned it off, and it works now.. :D

« Last Edit: April 14, 2012, 08:46:08 pm by mathy »
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Offline SkyPilotage

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Re: ALL CIE PHYSICS DOUBTS HERE !!!
« Reply #1032 on: April 14, 2012, 09:15:24 pm »
Im very glad to help! Feel free to post more doubts!

What do you guys think about why the shock waves frequency has to be higher than the natural frequency of the seismometer?
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Offline Physics09

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Re: ALL CIE PHYSICS DOUBTS HERE !!!
« Reply #1033 on: April 18, 2012, 08:08:37 pm »
« Last Edit: April 18, 2012, 08:38:38 pm by Physics09 »
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Offline raamishstudent

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Re: ALL CIE PHYSICS DOUBTS HERE !!!
« Reply #1034 on: April 20, 2012, 06:28:43 am »
4C take the amplitude of the crest not the whole wave and multiply it by 4. The answer should be 1.5 * 4 = 6

9D formula will be m2v2 for momentum after collision so (m+m)v = 2mv. K.e energy will be 1/2mv2 * 1/2mv2 = mv2

10D direction is changing so negative sign. So change will be -mv -(mv) = -2mv

And i dont know how to do 13 and 14 so plzz somebdy do them :)))
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