Qualification > Revison Notes

CIE AS PHYSICS PAPER 1 (OCT/NOV)

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Tyserius:

--- Quote from: jademax on November 13, 2009, 06:59:13 am ---ahh i see now.. thanks alot mate
This is wat i did:
P=I^2R but then i said 2(0.05/2.50)+0.02/4.7 =0.04

then 0.04*100=4%

--- End quote ---

Just so you know, it is 2% of 4.7 which is 0.094. So, if you wanna actually use the fractional way to do it is :

2(0.05/2.50) + 0.094/4.7 = 0.06

0.06 x 100 = 6% :)

Careless you! To use 0.02/4.7!

Tyserius:

--- Quote from: jademax on November 13, 2009, 07:01:54 am ---how do u get 2% as uncertainty for I?

Could u pls show me step by step

--- End quote ---

It's (0.05/2.50) x 100% = 2%

jademax:
ahh lol damn i make too many mistakes..well my tution teacher also said that as well.

Thanks for the help mate

MaNi_DaDuDe:

--- Quote from: jademax on November 13, 2009, 07:01:54 am ---how do u get 2% as uncertainty for I?

Could u pls show me step by step

--- End quote ---

0.05/2.50 x 100%

Ughh I don't even remember how my paper went :(

Sucked. I didn't have much sleep so it was like I gave the paper, came out and it was like WTF just happend? Seriously..:(

Tyserius:

--- Quote from: jademax on November 13, 2009, 07:05:41 am ---ahh lol damn i make too many mistakes..well my tution teacher also said that as well.

Thanks for the help mate

--- End quote ---

I always think that tuition's a waste of time and money :( I rather use that time and money to learn something else such as singing! :D

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