IGCSE/GCSE/O & A Level/IB/University Student Forum
Qualification => Subject Doubts => GCE AS & A2 Level => Sciences => Topic started by: joel on May 20, 2011, 07:15:21 am
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Could anyone do the October/November 2002, Paper 5, Question 2.
Link to question paper -
http://www.xtremepapers.me/CIE/index.php?dir=International%20A%20And%20AS%20Level/9702%20-%20Physics/&file=9702_w02_qp_5.pdf
(http://www.xtremepapers.me/CIE/index.php?dir=International%20A%20And%20AS%20Level/9702%20-%20Physics/&file=9702_w02_qp_5.pdf)
Thanks!
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All the design questions from May/June 2002 to October/November 2006 are really tricky.
So I you guys don't mind, can you upload your answers if you have done those questions.
I am also attaching a pdf document containing all the design questions from June 2002 to November 2006.
Please reply soon!
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Just a heads up... people may take a while to reply.. because if theyre like me- they havent done the papers before 2006. :-\
But I'll have a go anyways :D. In simple.. for the experiment I'd probably have a signal generator attached to a vibrator connected to the string. The string would be in a pulley system with a known wieght attached to the end (can find tension from that). For different masses (tensions), vary the vibrations until a max amplitude is seen.. the frequency that it occurs at is the resonant frequency. Record the resonant frequency and tension.. construct a graph- tension on x-axis and frequency on y-axis. right? And the controls- same mass per unit length of wire.. same length of wire (basically same wired used) for each tension... but the thing im stuck on is -would you have to change the lengths to keep it at the fundamental mode for each tension?? TBH- i cant remember what the fundamental node is. :P and safety - i dont know?- maybe ear protection incase of high pitch frequencies?
hope i helped in some way. sorry if its vague.. its just off the top of my head.
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how can u find the tension from the weights?
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how can u find the tension from the weights?
dont know.. google it. :P
Im pretty sure its got something to do with the weight. ?
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cant we just turn the pegs of a guitar and attach a newton meter to it?
secondly can someone PLEASE explain ON09 P51 q1 and with a diagram if possible please! =(
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cant we just turn the pegs of a guitar and attach a newton meter to it?
secondly can someone PLEASE explain ON09 P51 q1 and with a diagram if possible please! =(
that actually seems smarter :P .. how do you find the frequency tho?
And what exactly do you need help in that?.. its easier that way. instead of writing up the whole thing- cause you could just look at the marking scheme?
I attached a paint version of the diagram I drew which my teacher said was okay.
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Just a heads up... people may take a while to reply.. because if theyre like me- they havent done the papers before 2006. :-\
But I'll have a go anyways :D. In simple.. for the experiment I'd probably have a signal generator attached to a vibrator connected to the string. The string would be in a pulley system with a known wieght attached to the end (can find tension from that). For different masses (tensions), vary the vibrations until a max amplitude is seen.. the frequency that it occurs at is the resonant frequency. Record the resonant frequency and tension.. construct a graph- tension on x-axis and frequency on y-axis. right? And the controls- same mass per unit length of wire.. same length of wire (basically same wired used) for each tension... but the thing im stuck on is -would you have to change the lengths to keep it at the fundamental mode for each tension?? TBH- i cant remember what the fundamental node is. :P and safety - i dont know?- maybe ear protection incase of high pitch frequencies?
hope i helped in some way. sorry if its vague.. its just off the top of my head.
how would u measure the resonant frequency?
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that actually seems smarter :P .. how do you find the frequency tho?
And what exactly do you need help in that?.. its easier that way. instead of writing up the whole thing- cause you could just look at the marking scheme?
actuallyy i wouldnt apply the guitar method cuz turning the pegs would vary the length of the wire. ur way is better, but i dont underatnd how u wud calculate the frequency? secondly i dont understand the marking scheme for ON09 , so if u cud gimme a diagram, it'll be very helpful. =)
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The signal generator thing would give you the frequency? .. or.. you attach that to a CRO with a known timebase scale- and read off that?
I edited my previous post with a shifty diagram. lol. its easier than getting my scanner out. :D
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yeah i guess u cud read off the frequency that gave off max amplitude oscillation from the signal generator. and thanks for the diagram! ur a life saver! =D
one more thing, what is ur dependent and indepenedent variable in the ON09 question?
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I took resonant frequency as dependent.. and volume as independent.
so f2 on y-axis and 1/V on x-axis.
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thankyouu soooooo effing much! =D =D =D
+rep =D =D
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May June 2010 Paper 5, question 1, what should we draw exactly for the diagram?
Can someone help with this and post their drawing if possible?
Really appreciate the help.
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51 or 52?
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51 or 52?
Sorry about that, its paper 52, the one with the circular coil.
And thank you for helping out :) .
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sorry its really crappy... again. lol.
um.. basically try and show that the hall probe is positioned at right angles to the flux coming through the coil, like 3D- it would take me forever to do that on paint- sorry. :-\
I took the hall probe image from what was in a paper 4 question. Remember to mention the current through the probe is constant.... i dont know if thats needed for this - but in the diagram i drew that my teach checked - i drew like this flat square sheet like thing connected to a Volmeter across one side and a power supply across the other side (if that makes sense?), and labelled it 'precalibrated hall probe' ... and the only correction on that was to 'state a constant current thru probe'.
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Thank you so much for the help, dont worry, its perfect, just what I wanted.
+rep ;)
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guys! have you done nov 07 p5? how do u find out the error for the y intercept? and value for k? I just got a point off my values, subsituted for best fit gradient and worst fit gradient and subtracted the two and got the error. Is that right?
I got -.104 +- .0272 and .510 +- .025 for k .is that close? and are the numberz for sf ok for the errors?
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i did not get any numbers that u are saying for any question, but yes ur method is ryt. =)
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does anyone know how to calculate the fundamental frequency of , eg, an empty jar. PLEASE i reallyyy need this!!!!!!!!! :(