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Author Topic: ALL PHYSICS DOUBTS - POST HERE !!  (Read 197645 times)

Offline Moonlyte

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Re: ALL PHYSICS DOUBTS - POST HERE !!
« Reply #2070 on: May 26, 2010, 05:18:25 pm »
I don;t understand thermocouples. Could someone please explain?
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Offline Fastal

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Re: ALL PHYSICS DOUBTS - POST HERE !!
« Reply #2071 on: May 26, 2010, 05:20:29 pm »
Quote from: Fastal on May 26, 2010, 05:06:25 pm
what do we have to know for this part of the syllabus? do we need to know Hugyens constructions and stuff?

describe the use of water waves to show-
(i)reflection at a plane surface
(ii)refraction due to a change of speed
(iii)diffraction produced by wide and narrow gaps[understand the diffraction part]

-interpret relection, refraction and diffraction using wave theory



GUYS CAN I get a confirmation that ang3ls right????
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Offline NidZ- Hero

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Re: ALL PHYSICS DOUBTS - POST HERE !!
« Reply #2072 on: May 26, 2010, 05:20:51 pm »
yo master help me wid diz m/j 2005 q8 (a)
n (b)
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Offline Malak

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Re: ALL PHYSICS DOUBTS - POST HERE !!
« Reply #2073 on: May 26, 2010, 05:23:08 pm »
If in exam we are told to draw a thermocouple...Is this form of diargram correct??

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Offline Adzel

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Re: ALL PHYSICS DOUBTS - POST HERE !!
« Reply #2074 on: May 26, 2010, 05:27:59 pm »
Quote from: Nidzzz on May 26, 2010, 05:20:51 pm
yo master help me wid diz m/j 2005 q8 (a)
n (b)


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Offline Ghost Of Highbury

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Re: ALL PHYSICS DOUBTS - POST HERE !!
« Reply #2075 on: May 26, 2010, 05:30:21 pm »
Quote from: ang3l on May 26, 2010, 05:23:08 pm
If in exam we are told to draw a thermocouple...Is this form of diargram correct??



yes.
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Offline Adzel

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Re: ALL PHYSICS DOUBTS - POST HERE !!
« Reply #2076 on: May 26, 2010, 05:30:23 pm »
Quote from: ang3l on May 26, 2010, 05:23:08 pm
If in exam we are told to draw a thermocouple...Is this form of diargram correct??



Nope...Draw this,

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Offline Malak

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Re: ALL PHYSICS DOUBTS - POST HERE !!
« Reply #2077 on: May 26, 2010, 05:32:07 pm »
Ohkay...So...Yes or no ?  :P
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Offline Ghost Of Highbury

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Re: ALL PHYSICS DOUBTS - POST HERE !!
« Reply #2078 on: May 26, 2010, 05:33:06 pm »
Quote from: weaam on May 26, 2010, 05:12:22 pm
Can anyone draw how the picture will loook like after parts a i,ii are done in o/n 09 Q 4!
Reaaallly urgent, i cant seem to get an answer to it!
ill +rep if u help  ::)

attached
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Offline Ghost Of Highbury

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Re: ALL PHYSICS DOUBTS - POST HERE !!
« Reply #2079 on: May 26, 2010, 05:33:37 pm »
of course u can that, it has the hot junction / cold junction the wires..and the meter..
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Offline mdwael

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Re: ALL PHYSICS DOUBTS - POST HERE !!
« Reply #2080 on: May 26, 2010, 05:35:24 pm »
can someone explain me question 11 (the last one) in oct/nov paper 3 physics year 2007? pls save my life cuz tommorow is my exam  :-[
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Offline Malak

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Re: ALL PHYSICS DOUBTS - POST HERE !!
« Reply #2081 on: May 26, 2010, 05:36:28 pm »
Quote from: A@di on May 26, 2010, 05:33:37 pm
of course u can that, it has the hot junction / cold junction the wires..and the meter..
Okay...thx Thats muchh eaiser :D

Q1 both parts..

http://www.freeexampapers.us/IGCSE/Physics/CIE/2009%20Nov/0625_w09_qp_32.pdf
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Offline Malak

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Re: ALL PHYSICS DOUBTS - POST HERE !!
« Reply #2082 on: May 26, 2010, 05:40:47 pm »
Quote from: mdwael on May 26, 2010, 05:35:24 pm
can someone explain me question 11 (the last one) in oct/nov paper 3 physics year 2007? pls save my life cuz tommorow is my exam  :-[

For part a

First you take counter readings without any source or absorber only detector...This is the background
Then you take reading with Source and detector
Then take reading with source , detector Plus absorber which is aluminium in this case (one sheet at a time..u keep adding and take reading)
Finally subtract the background reading from the result

Part b:
The counter readind decreases as the thickness of aluminium is increased
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holtadit

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Re: ALL PHYSICS DOUBTS - POST HERE !!
« Reply #2083 on: May 26, 2010, 05:41:32 pm »
Can someone please explain what voltage drop is ???
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Offline Malak

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Re: ALL PHYSICS DOUBTS - POST HERE !!
« Reply #2084 on: May 26, 2010, 05:42:04 pm »
Quote from: Ari Ben Canaan on May 26, 2010, 05:41:32 pm
Can someone please explain what voltage drop is ???
2009 nov ?:P
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