HOW WAS physics 51?????

[WellWIshER]

so guys how was it???



NB: i am not discussing the paper just want to know da difficulty level :x

 

[fusionistics]

so guys how was it???



NB: i am not discussing the paper just want to know da difficulty level :x

It was fine. How was your's?

 

[WellWIshER]

NORMAL

 

[srukhan]

screwed up the error in the table and the last bit, but overall it was 'Alhamdulillah' a fine paper indeed

 

[SarahKotb]

I did the exam it was extremely easy and I think I will get 25-26 out of 30 and 24 as a minimum.
How was yours?

 

[WellWIshER]

i think we can discuss now/?

 

[blueindigo]

yea can we???

for the first question, how did you find out the absorbtion coefficient????

 

[WellWIshER]

by da gradient -A I GUESS??

 

[SarahKotb]

if u draw lnV against nt then -alpha = gradient
what variables did u keep constant?
i kept the light source constant, temperature of the glass and
the distance between the light source and the photocell.

 

[WellWIshER]

lol temp???? i dont think its an ldr but yeah i wrote da other 2

 

[SarahKotb]

so what were the additional details that u wrote?
i said repeated measurements for t, light source must be normal to the glass sheets and the photocell
then i wote the equation lnV=lnV0 - ALPHAxt

 

[WellWIshER]

instead of saying perpendicular i said keep a constant orienation!!

sounds better and yea same equation

did u use ammeter in photo cell

 

[SarahKotb]

i used a voltmeter as it says induced emf so voltmeter not ammeter
what did u say for safety precautions?

 

[WellWIshER]

i herd some nerds talkin abt ammeter n some connections wierd11

xaminers r gona laugh at my diagram alto i could draw better but i couldnt be bothered !!

i just connected da cell to da voltmeter

safety ... wear shades 8) and be cool

 

[SarahKotb]

ok thats what u had to do a voltmeter connected to the photocell to measure the voltage

did u realise for the graph question that the pressure was x10^5

alot of students in my center missed that

 

[WellWIshER]

yes i did realize but i got da % error rong i did 1/12 alto i tried da other way round

wt was ur gradient

 

[WellWIshER]

btw x10^5 doesnt affect da gradient value

 

[SarahKotb]

my gradient was 43.2 x10^3

 

[WellWIshER]

how abt 4.32 x10^4???

THTS wt i got

 

[SarahKotb]

oh really thats gr8!
amazing u got the same gradient as mine!
so what did u get for n
i got 3.39x10^19