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Author Topic: How were the exams?(Edexcel)  (Read 5355 times)

Offline Darth Austrakast

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How were the exams?(Edexcel)
« on: May 13, 2010, 09:23:00 am »
I hope the restriction for exam discussion of Edexcel 6BI07 and 6PH07 is over  :)
how were the exams? Mine were pretty much okay..........I found the Bio paper tricky but consistent to the new syllabus questions. However the physics alternative to practical was a total pain..............
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Offline T.Q

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Re: How were the exams?(Edexcel)
« Reply #1 on: May 13, 2010, 09:26:16 am »
u can discuss unit 3 bio & phy papers

i did phy , it wasn't hard
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Offline abuyusef

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Re: How were the exams?(Edexcel)
« Reply #2 on: May 13, 2010, 09:39:07 am »
Hello out there anyone got the unofficial solutions
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Offline Darth Austrakast

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Re: How were the exams?(Edexcel)
« Reply #3 on: May 13, 2010, 09:54:18 am »
In bio a question was asked regarding the modification of bibliography.What change did you guys made in the bibliography?
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Offline T.Q

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Re: How were the exams?(Edexcel)
« Reply #4 on: May 13, 2010, 10:10:53 am »
Quote from: abuyusef on May 13, 2010, 09:39:07 am
Hello out there anyone got the unofficial solutions

there is no unofficial mark scheme
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Offline Black Kitty

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Re: How were the exams?(Edexcel)
« Reply #5 on: May 13, 2010, 10:32:19 am »
Yeah, u're right, u're talkin about the international written alternative to practicals for as?? I did it as well, it wasnt that hard......However, I had a few doubts, u thnk u can clear them for me??

1. 1st MCQ...the current answer was 20 mA??
2. 3rd MCQ i think....the LDR one...what was the dependent variable?
3. What would be the 3 precautions 4 measuring reaction time?? I've written avoiding paralax error, and keeping the device vertical, but could u clarify this 4 me?
4. How would you draw the ray path through the glass block??
5. The sini/sinr does pass through the origin, right? But how would you explain why?
6. I got the refractive index as 1.59..Some others got it like me, while others got quite diff values like 1.39, 1.48, etc...U think tht's right??

I know its gonna be a pain to ans all this, but jus be concise....Thanks....
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Offline T.Q

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Re: How were the exams?(Edexcel)
« Reply #6 on: May 13, 2010, 10:46:44 am »
Quote from: Black Kitty on May 13, 2010, 10:32:19 am
Yeah, u're right, u're talkin about the international written alternative to practicals for as?? I did it as well, it wasnt that hard......However, I had a few doubts, u thnk u can clear them for me??

1. 1st MCQ...the current answer was 20 mA??
2. 3rd MCQ i think....the LDR one...what was the dependent variable?
3. What would be the 3 precautions 4 measuring reaction time?? I've written avoiding paralax error, and keeping the device vertical, but could u clarify this 4 me?
4. How would you draw the ray path through the glass block??
5. The sini/sinr does pass through the origin, right? But how would you explain why?
6. I got the refractive index as 1.59..Some others got it like me, while others got quite diff values like 1.39, 1.48, etc...U think tht's right??


I know its gonna be a pain to ans all this, but jus be concise....Thanks....


for the FIRST  MCQs  i answered B which is 20 m , and for the 3rd one the answer is light intensity

for the precautions, i wrote , repeat/ take average , avoid parrlex  error , make sure the ruler is vertical

for the line , u have to say that u make two marks on the block where the light is passing into the block
and out of the block , and then remove the block  ,and draw a line between the two marks

also , i said it shouldn't pass , because refractive index will be zero their

i got the refractive index = 1.4  
« Last Edit: May 13, 2010, 10:48:35 am by T.Q »
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Offline Darth Austrakast

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Re: How were the exams?(Edexcel)
« Reply #7 on: May 13, 2010, 10:49:42 am »
i wrote 20 mA
dependent variable would be resistance
well my precautions matches with yours........
rays can me drawn by tracing the light and marking its bath with crosses and then by joining the crosses
my refractive index was 1.46
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Offline T.Q

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Re: How were the exams?(Edexcel)
« Reply #8 on: May 13, 2010, 10:55:02 am »
Quote from: Austrakast on May 13, 2010, 10:49:42 am

dependent variable would be resistance


independent was the distance

dependent was the light intensity
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Offline 7ooD

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Re: How were the exams?(Edexcel)
« Reply #9 on: May 13, 2010, 12:16:55 pm »
tq i dnt kno if repeat n take average is corret cuz it is reaction so every time it may be diff i said check for zero error instead :p
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Offline T.Q

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Re: How were the exams?(Edexcel)
« Reply #10 on: May 13, 2010, 12:22:05 pm »
Quote from: 7ood on May 13, 2010, 12:16:55 pm
tq i dnt kno if repeat n take average is corret cuz it is reaction so every time it may be diff i said check for zero error instead :p

ya , because every time it will have a different reaction time, so u have to repeat and take average  
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Offline Book lover22

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Re: How were the exams?(Edexcel)
« Reply #11 on: May 13, 2010, 01:42:10 pm »
Dependent variable was resistance cuz da question clearly said ' ohmeter acts as a light indicator' so an ohmeter measures in terms of resistance which is directly proportional to light intensity...but u cant literally see da light intensity varyin rite? i dunno if this is ryt but dats my logic..hehehe  so i agree wid Austrakast! :D
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Offline Book lover22

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Re: How were the exams?(Edexcel)
« Reply #12 on: May 13, 2010, 02:25:57 pm »
Hey hold on i made my graph throught da straight line n got my refractive index  as 1.46 which is close 2 da real value of glass (1.49) but why is every1 sayin not thru da origin cus i made a best fit line by missin da first point! also my reason was dat sin 1 is directly proportional 2 sin r!

im confused :S
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Offline Black Kitty

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Re: How were the exams?(Edexcel)
« Reply #13 on: May 13, 2010, 04:20:03 pm »
As for the above rest, I agree with y'all...But I still think

1. The dependent variable for the LDR should be distance probably
2. Any correct sini/sinr graph must pass through the origin....Check this out.....http://www.thealy.com/LCPhysics/exp/exp06/snell_values.htm
3. As for my value of 1.59, that too should be just right as the previous mark scheme guidelines tell the examiner to allow for the ans between a max diference of 0.3........
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Offline Darth Austrakast

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Re: How were the exams?(Edexcel)
« Reply #14 on: May 13, 2010, 04:25:22 pm »
the independent variable is distance-the one which you can control and change; the dependent variable is light intensity which changes as you change the independent variable, in this case resistance
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