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how to find error in log as in november 09 p51 http://www.xtremepapers.com/papers/...nd AS Level/Physics (9702)/9702_w09_qp_51.pdf
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A2 Physics | Post your doubts here
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I wanna know too 
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I wanna know too
lg(1000/990)=0.004.........for the first value...
eg...... lg (990+10/990)=0.004....
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hey guys, did anyone compile all the p5 stuff? I kinda left it cause I was doing p2.. now Im freaking out
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Can anyone help me pleeaaaasseeeeee
http://www.xtremepapers.com/papers/...nd AS Level/Physics (9702)/9702_s11_qp_53.pdf
@nd question when i find the gradient do i use R values *10^-3 or dont and also in D) its some the answer as the gradient ?
http://www.xtremepapers.com/papers/...nd AS Level/Physics (9702)/9702_s11_qp_53.pdf
@nd question when i find the gradient do i use R values *10^-3 or dont and also in D) its some the answer as the gradient ?
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Yes,You do have to use that *10^-3 in calculating the gradient... and yes d) is the same answer as the gradient!
JazakAllah broder but are u sure cz lyk same answer that weird
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yes it will be the same answer.. the 2 marks for that are 1 mark for the answer being in the appropriate range and 1 mark for the units!
Also brother could u tell me ure uncertainity for e1 if u have done it before .
If u havent is it like i find the best V/E and the worst and substract
JazakAllah
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i have done it before.. but i dont have the answer.. but ur method is correct!
Thanks a lot .
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ur welcome!
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Just found this, it's fom the examiner's booklet:
--------------------------------------------------------------------------------------------------
Paper 5 Tips: Practical Test
Experiment Question
•
Although the experiment question in Paper 5 has a similar structure to the experiment
question in Paper 3, the techniques that you will be required to use are more
demanding. For example, you may be asked to plot a logarithmic graph and to
rearrange an equation into its logarithmic form. Therefore you should ensure that you
are fully familiar with the mathematical processes for taking logarithms and dealing
with exponential functions as well as the use of logarithmic graphs to test exponential
and power law variations.
•
When you are producing the column headings of your results table be careful how
you write down the units of quantities where the logarithm has been found. For
example, the logarithm of a length “l” measured in centimetres using a base of ten
should be written as log (l/cm). Note that the unit is inside the bracket with the
quantity so that “l/cm” is dimensionless. This is because a logarithm is a power and
therefore has no units.
Design Question
•
Do not panic if the context of the question appears unfamiliar to you. During your A
Level studies you will have used or learnt about suitable apparatus for completing the
task. If you are asked to use any unfamiliar apparatus the question will supply you
with all the details that you need to know about.
•
Read the question very carefully – it may give you guidance on those aspects of your
design to which you need to pay particular attention.
•
When relating your answer you will need to consider some or all of the following:
- what apparatus you will use
- what experimental arrangement will be used
- what procedure will be followed
- the independent and dependent variables
- the means of keeping other variables constant
- how the raw data readings will be processed to give the desired result, e.g.
what derived quantities you might calculate or what graph you might plot
- what
relevant
safety precautions should be in place
•
When writing your answer you must write down all the information clearly and
explicitly
- the examiner cannot give you marks for things that are vaguely implied.
•
Many of the marks can often be scored by having a good diagram (even if the
accompanying explanation is weak) and so you should spend time making sure that
your diagram shows all the relevant details and is fully labelled.
•
The equipment and procedures that you describe in your answer should be realistic
and workable.
•
As part of your preparation for this question you should design some of your own
experiments, but this should be done under the close supervision of your teacher.
Also practise answering past papers.
•
You do not need to write a conclusion to your designed experiment or draw sketch
graphs of what the results will be. Since no experiment has been carried out, it is not
possible to give marks for this.
--------------------------------------------------------------------------------------------------
Paper 5 Tips: Practical Test
Experiment Question
•
Although the experiment question in Paper 5 has a similar structure to the experiment
question in Paper 3, the techniques that you will be required to use are more
demanding. For example, you may be asked to plot a logarithmic graph and to
rearrange an equation into its logarithmic form. Therefore you should ensure that you
are fully familiar with the mathematical processes for taking logarithms and dealing
with exponential functions as well as the use of logarithmic graphs to test exponential
and power law variations.
•
When you are producing the column headings of your results table be careful how
you write down the units of quantities where the logarithm has been found. For
example, the logarithm of a length “l” measured in centimetres using a base of ten
should be written as log (l/cm). Note that the unit is inside the bracket with the
quantity so that “l/cm” is dimensionless. This is because a logarithm is a power and
therefore has no units.
Design Question
•
Do not panic if the context of the question appears unfamiliar to you. During your A
Level studies you will have used or learnt about suitable apparatus for completing the
task. If you are asked to use any unfamiliar apparatus the question will supply you
with all the details that you need to know about.
•
Read the question very carefully – it may give you guidance on those aspects of your
design to which you need to pay particular attention.
•
When relating your answer you will need to consider some or all of the following:
- what apparatus you will use
- what experimental arrangement will be used
- what procedure will be followed
- the independent and dependent variables
- the means of keeping other variables constant
- how the raw data readings will be processed to give the desired result, e.g.
what derived quantities you might calculate or what graph you might plot
- what
relevant
safety precautions should be in place
•
When writing your answer you must write down all the information clearly and
explicitly
- the examiner cannot give you marks for things that are vaguely implied.
•
Many of the marks can often be scored by having a good diagram (even if the
accompanying explanation is weak) and so you should spend time making sure that
your diagram shows all the relevant details and is fully labelled.
•
The equipment and procedures that you describe in your answer should be realistic
and workable.
•
As part of your preparation for this question you should design some of your own
experiments, but this should be done under the close supervision of your teacher.
Also practise answering past papers.
•
You do not need to write a conclusion to your designed experiment or draw sketch
graphs of what the results will be. Since no experiment has been carried out, it is not
possible to give marks for this.
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thanks
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the attachment is the graph i made . hope it helps u .
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hey, in your worst-fit line.. shouldn't the line fo from the top of the first error bar to the bottom of the last?
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yes i think i did it wrong .. if u knw the correct one plz let me know also .
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well as I said, for your worst fit line, the line should start from the top of the first error bar and connect to the bottom of the last error bar, and should pass through all error bars
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i think now dis one is correct. :s 