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# AQA Physics Unit 4 Thread - JAN 28th 2010 (Post Exam) watch

1. (Original post by jetheridge1)
Mutiple choice was piss easy, but fckd up majorly on the transformer 1 haha.

I got 1.95 for the length too
what did you get for the capacitance?
223 micro farads
2. (Original post by fabregassed)
mine peaked at t/4 and T/3/4.
Which is the same as mine...
3. 2.17x10 - 4 or something
4. (Original post by kayn)
223 micro farads
YES!
5. (Original post by jetheridge1)
Mutiple choice was piss easy, but fckd up majorly on the transformer 1 haha.

I got 1.95 for the length too
what did you get for the capacitance?

i think i got 220uf
6. eughhhh worst exam so far. and it should have been my best.
I'm pissed offffff.
7. Why transformers! Why!
zero marks there. I only wrote the energy is lost as sound for the entire question. I completely forgot to look over my notes for this....
8. (Original post by WilliamWJ)
eughhhh worst exam so far. and it should have been my best.
I'm pissed offffff.
it was an easy exam, but it was easy to make mistakes on it, but im hoping my multiple choice made up for it.
9. (Original post by fabregassed)
i think i got 220uf
Me too
10. January Exams Are ****
11. (Original post by Dev1992)
According to my teacher for the length of the pendulum one you had to put 1.9 m as the question asked for appropriate significant figures and the both the data was given to this amount

what was the Power wasted in Watts for the last question?
your teacher is chatting waffle.
12. for the multiple choice what did you get the momentum of the water?
13. (Original post by Dev1992)
According to my teacher for the length of the pendulum one you had to put 1.9 m as the question asked for appropriate significant figures and the both the data was given to this amount

what was the Power wasted in Watts for the last question?
I think i put 1.9, cant remember

I did P= IV = 300mA x 9V = 2.7W

?
14. (Original post by fabregassed)
it was an easy exam, but it was easy to make mistakes on it, but im hoping my multiple choice made up for it.
I've had 6 exams so far this Jan, im ******* worn out and this exam was the worst.

One more exam for me in June....
15. (Original post by 2710)
I think i put 1.9, cant remember

I did P= IV = 300mA x 9V = 2.7W

?
i rememebr 2.7
16. Yeah whoever drew that graph is an idiot,, did your teacher tell you to draw waves??? its just a |Sine| curve! :P

the momentum of water was answer b 5.6*10^-2 use volume and Area to calculate velocity and density and volume to do mass!
17. I put b for the water question in multiple choice
18. (Original post by Robwadders)
Yeah whoever drew that graph is an idiot,, did your teacher tell you to draw waves??? its just a |Sine| curve! :P

the momentum of water was answer b 5.6*10^-2 use volume and Area to calculate velocity and density and volume to do mass!
I got that too
19. for the transformers energy question i wrote about heat loss through resistance and back emfs. is this correct? i then said laminated core and using soft iron to decrease energy loss..did i talk about the correct things?
20. (Original post by MarkoVan)
for the transformers energy question i wrote about heat loss through resistance and back emfs. is this correct? i then said laminated core and using soft iron to decrease energy loss..did i talk about the correct things?
yes

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