lolcwirawan said:*hifive* we're in the same boat XD i was so screwed for that exam.. =(
i wish death to it toooooobellanchez said:i hope i get above 80... got 75 in trial but didnt study that much.
how fucked was that energy, work question. i wish it to die
Oh I know the feeling! I had that day too! Theres all japanese all over my physics question booklet because I got bored, I had done all I could (which wasnt a graet deal)....cramming physics really isnt a good idea boys and girls...karumi said:>_< ahh I didn't like it at all but that's just me. 36 hours of cramming the entire physics course of 1 year doesn't really work. I'm still blissfully hoping my exam marker will be blind and think all my answers are correct ... that and I had Japanese afterwards. Worst day of my life with 6 hours of exams in total! *cries*
StYlez- said:multiple choice was easy, cept the transformer 1, forgot voltage could go negative -_-"
distance between the two wires was difficult, i only subb'd the first value of mass into F = mg
then used the first value of current, when u use the average.
prolly lost most my marks in the 4/6 mark questions, prolly only get 3/5 max.
overall. easier than last year.
at least we didnt get any stupid michael jordan questions
You have to remember that transformers are an application of Lenz's Law, and respond to a change in flux. So as the student turned the thing on and off there was a change in flux, thus the answer is A.StYlez- said:transformers only work on AC current dont they"???
Same as last years question using DCadothetechy said:You have to remember that transformers are an application of Lenz's Law, and respond to a change in flux. So as the student turned the thing on and off there was a change in flux, thus the answer is A.
A transformer can work off a DC supply as long as there is a method of changing flux. Most of the induction coils you see at school to power cathode ray tubes are DC supplies, that are transformed. There is an electromagnetic switch to turn them on and off and make a constantly changing flux.Transformers do only work on AC, but the question wasn't asking for a working scenario, damn trick.
Youre dead right. Finally someone with at least half a brain on these forums.sja said:band 6 cut off this year will be the same as it is every year
from 78 to 82/100
oh and i dont know how you guys seriously think everyone is getting 85-90/100 raw. do you understand how critical they are when it comes to the 4-6 markers? everyones assuming they all got 6/6 for the longer responses. this exam was more like an english exam
the photo electric effect question needed you to discuss scientists like einstein and maxwell, talking about how scientists discovered what light was made of etc. you're looking at 4/6 maximum if you didn't include hypothesis, theories, scientific methods - practical experiements...
oh and future potential applications of super conductors - if you did not mention the economic costs and practicality and how much time/effort and effiency will be lost when converting to methods chosen then youre stuck on 4/6 with perfect explanation and terminology
good luck everyone
don't worry, i figured it all out but forgot what k was... of course it is a constant that is in the bloody formula sheet... i'm so annoyed now... *shrugs*rivergumrob said:I was really happy with it...physics is must best subject tho, and we have an awesome teacher. I think around 85 is what ill get, but two of my mates think theyll get 95...its a little crazy. I didnt like the question about calculating the distance between the two copper rods, i know you had to use F/l=kI1I2/d, but i didnt know how to find F. grrr....how do you do it?
Cheers