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Physics 9702 Paper 5 (52) 18/05/2018

Discussion in 'CIE' started by MahiTheKilla, May 18, 2018.

  1. MahiTheKilla

    MahiTheKilla

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    How was the paper guys?
    personally I found it quite hard. Couldn't finish it properly on time
     
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  3. Ahmed kooheji

    Ahmed kooheji

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    I did p51 and I could relate to you .. was difficult and lengthy
     
  4. amina1300

    amina1300

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    Same 52 was hard couldn't complete the last two parts in time.
     
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  5. MahiTheKilla

    MahiTheKilla

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    What answers did you guys manage to get in question no.2?
    I got all the uncertainities in the table by dividing value of nR by 10. My gradient was (3.5+-0.4)x10^-3 ohm^-1 s
    Percentage uncertainity was 9.1%
    Value of K (last answer) was 59000+-5000 ohm.
    Value of C was (2.2+-0.2) mF
    The error bars were horizontal on the graph too.
     
  6. Zaki ali asghar

    Zaki ali asghar

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    Q1 was quite easy, I found Q2 bit hard. My value of K was 60000, rest i don't remember
     
  7. Zaki ali asghar

    Zaki ali asghar

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    wasn't 10 the %uncertainity in the values of R ?
     
  8. MahiTheKilla

    MahiTheKilla

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    I did q1 later.. i didnt mention details about how to vary h like replacing LEDs with different lights, etc :| but i wrote down all the safety precautions and additional details. Also about plotting a graph. How much marks do you think I'd lose?
     
  9. Zaki ali asghar

    Zaki ali asghar

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    2 marks are for independent and dependable variables
    3 for graph analysis
    6 for add and safety details
    4 for diagram and how to collect measures.
    i guess you'll lose around 2
     
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  10. MahiTheKilla

    MahiTheKilla

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    Thankyiou so much! But im scared because the point of q1 is having control over your variables in the experiment and I didnt even mention once on how to collect data for different wavelengths and heights. Injust wrote about what to keep constant and how it could be done.

    And yeah 4.7+-10% was the uncertainity for R
     
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  11. bacon byun

    bacon byun

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    What were the dependent and independent variables in Q1?
     
  12. Zaki ali asghar

    Zaki ali asghar

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    wavelength, independent and h dependent
     

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