Discussion in 'CIE' started by MahiTheKilla, May 18, 2018.
How was the paper guys?
personally I found it quite hard. Couldn't finish it properly on time
I did p51 and I could relate to you .. was difficult and lengthy
Same 52 was hard couldn't complete the last two parts in time.
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.
Q1 was quite easy, I found Q2 bit hard. My value of K was 60000, rest i don't remember
wasn't 10 the %uncertainity in the values of R ?
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?
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
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
What were the dependent and independent variables in Q1?
wavelength, independent and h dependent
Separate names with a comma.