Unit 3 VCE Physics exam 2011 review
By Heath McGregor on Jun 14, 2011 in VCE Exams, VCE Physics, VCE Resources
Hi all,
By now, you should have finished the Unit 3 VCE Physics exam for 2011. What did you think of the paper? What was hard? What was easy? How do you think you went?
Let us know your thoughts and comments below (please keep them clean!)…cheers
(3 votes, average: 3.00 out of 5)
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Motion was good. Electronics was hard! And materials was kinda what I expected. Struggled to get through it all in time, I guessed the last couple of questions but oh well.
Anyone know the answer to the electronics “design a circuit” question… was it the 4500 ohms resistor?
It was tough, but doable. fluffed up the modulation question a bit i think in my response. Also, q10 of materials tricked some ppl. i think it was b(mesh all the way along the top) as i worked out that support a acted down on the board. my teacher reckons it was the harder than the last couple of years but anyways, hopefully the study payed off
yep, 4500 ohms was right i think
The time went so quickly during the exam. However, it was alright. The motion part was a little bit too long for me, but I still managed to complete the whole paper in time. I didn’t select A for any of my Materials questions (oh no!), and the modulation question I admit, I wrote a load of pluh! One of my friends wrote the answer to the very first question with the tractor as 0 N just because it was worth one mark. Also, everyone was getting an array of answers for the planet question in calculating the period (some had about 30 seconds!!). Hope everyone did extremely well.
from memory i got the period as around 3.2×10^6 seconds, although i might be wrong with the power there, cant really remember…
I got 500 Ohms for that question too. I calculated the voltage drop and the current required given the thermistor’s conditions (1500 Ohms at 20 degrees from memory?), and I got 500 Ohms as the required resistance. Could be wrong though – Electricity was never my strongest section.
I had issues with time as well. Went overtime on motion by about 10-15 minutes, tried to speed through electricity but probably only got through it in expected time, and had maybe 15 minutes left for detailed study (materials and structures), so like Rhi I had to rely on ‘guestimations’ for the last few in particular, but oh well =)
I didn’t have A for any of materials either Nicholas! For the final 2 questions (I had about a minute left) I literally shaded anything randomly before actually looking at the question just to make sure I had an answer, and selected A randomly for one of them simply because I hadn’t selected A yet =P
YES i got 3.2×10^6 seconds!!
I had about 30mins left when I finished the whole paper once…
I have a feeling that the resistor you use depends on where you put the thermistor and fan in the circuit, but i used the 4500ohm one.
The mesh would have to be a the bottom in that 1m gap in the materials I reckon. That is, afterall, where the concrete in in tension.
The spring and energy questions were quite interesting, a very similar question appeared in last year’s Unit 3 exam.
mesh is along the top all the way. once younwork out the force exerted by support B (5600N) you can figure out the force exerted by A, which ends up as a negative number, implying it is acting DOWN on the board. therefore, he board is in tension along the top the whole time.
I thought is was really hard I had 5 minutes left to do my detailed study (structures) so I guessed all of them. I’m so depressed because the my grade will probably depend on how good my guessing skills are.
it was the 4500ohm resistor, and you put the fan across that. if you put the 500ohm resistor, and the fan around the thermistor, then the fan would turn on if it got colder, not hotter
I spent way too long on motion, and thus only answered one or two questions out of electronics and skipped onto structures in the last 10 minutes =
though i guess most of motion should be right…its just entire electronics section that ill fail =( except for the simple ‘read off graph’ question…
Motion was too easy. Electricity was relatively simple, but I slipped up a couple here and there. (In my panic I didn’t even read the circuit properly and assumed there was no powere because the diode was in reverse bias) :facepalm:
I personally found it was too long, I guessed half of the structures questions which was annoying because I knew how to do all of them. Some of the motion was tricky and also some parts of the electronics. Moral of the story: start practice exams earlier and try finish with 5 minutes to spare!
wats up everyone… i found this physics exam very hard.. motion was the hardest part… If anyone wants to find out the solutions for this 2011 physics exam 1.. you can go on to this itute website.. they got all the answers…
http://www.itute.com/board/viewtopic.php?f=6&t=2414
it was too long. only had 5 minutes to do my detailed study. ):
hope they give us a decent scaling for our physics study score in the end.
hmmmm.
that was the hardest thing i ever did. seriously the detailed study 1 relatitvity, was hard and electronics was harder.
quite surprising they usually make montion really hard, but they made easy and long this time.
i think i’ll pass. But my dreams down the drain, unless the next one easy!!
Thought the exam was decent except for electronics – motion and structures was straightforward. What do u guys reckon the cut off for an A + will be????
i think the relaitivity part was very hard and motion was the easiest.
It was not a bad exam. Kind of what I expected. Definetely harder than the last two years though.
Electronics had some hard parts, but made up for it with those really simple amplifiers….
By the way, doing:
Vout = r1/(r1+r2)*Vin game a valueof 500 ohms for the resistor…
did anyone use pencil for the exam? im not sure if you were meant to :S
- Pen was a must
- i screwed up newtons third law and the draw circuit coz the question wanted temp greater than 20 ( they had it in bold)
- also was a bit iffy on matchin up graphs . absolutely forgot wat i chose
- for materials and structures concrete would be top an little at bottom left. ANYONE REMEMBER THE LAST MATERIALS AND STRUCTURES QUESTION . THE FULL QUESTION AND THE 4 CHOICES??
yeah…ummm… i didn’t find it too hard but i don’t think that there was enough time to complete it and ended up missing out on about seven questions or something ridiculous… argh i hate my life… what did the electronics thing with the thermistor mean by it needs an input v to work? i though Vin was 12 or what ever… did any one get the 500 ohm resistor?
hey, i used a pencil and the supervisor said we could use a pencil.
cool, i’m sort of stressing over it haha
Yeah i got 500 ohms.. but apparently its wrong… the correct answer is 4500 ohms, i have no idea how they got that though..
inside of front cover said responses must be in pen. the supervisor said pencil, then changed and said pen must be used 4 short answer
4500 ohms:
The temp had to be greater than 20, so the switch would be placed on the resistor.
Vout=R1*Vin/R1+R2
Rearrange =>
R1=[r2*Vin/Vout(over r2)] – R2
= [1500*6/1.5] – 1500
= 4500ohms
Wasn’t too bad overall, I definitely stuffed up a couple of questions though. The motion one near the start with blocks A, B & C was confusing & think I stuffed up, especially the explanations.
With the drawing a circuit one I got 500 ohms but was told after (by the smartest guy in my class) that it was 4500 ohms for some reason or other, so that sucks =/
Materials had a few really tough questions (the last 2 with the strange pic, was that under shear?? + the diving board one, it was between 2 of those choices, but I still don’t know if it was all along the top, or 1st bit under, rest of it above…)
does anyone have a copy of it?
i did the exam in pencil, will it affect anything? is it possible to get a 0?
The correct answer to the resistor one was 500 ohms.
The trick behind it was that the voltage out part went around the static and not the variable resistor.
If you did 4500 Ohms, and put the voltage out around the variable resistor, the air conditioner would turn on when it got cold, and turn off when it warmed above 20 degrees.
Otherwise, I don’t think I got much else right.
if you put v out over the 4500 ohm resistor, once the temp goes up, resistance across thermistor goes down which increases v out, giving you the 4.5v out or what ever they wanted for v out.
where can i get a copy of the exam?
who else did relativity as the area of study?? there was only about 2 questions where i was positive what the answer was!
They didnt say the way they wanted us to draw the circuit…
using the Vout = Vin x R2/ R1 + R2 formula
if you said the thermistor was R2 the one connected to the Switch you would have gotten 500 ohms for the resistor and 1500 ohms for the resistance of the Thermistor which was AT 20 degrees. BUT if you used R2 as the variable resistor then you’d get 4500…
seeing as they never said the way they wanted the circuit drawn we should ALL be correct…
I didn’t finish the exam this year :’( I had 4 questions from electronics left to do.
I checked my answers, besides those and ONE structures question i should get 80%…
I cant believe there was no collisons this year..
Motion was so long! I did pretty bad in it.
Electronics was relatively weird, slipped off here and there.
Materials and structures was amazingly easy.
VCAA UNIT-3 PHYSICS EXAM 2011
http://www.mediafire.com/?i8iz90m3zy1dybb
enjoy =D, or get more depressed finding more mistakes like me -_____-
The further electronics section to me was harder compared to motion and electronics.
Don’t you guys think so too? The multiple choice were paragraphs long. It was not like the other past years.
The motion was good, but the electronics was also a tad difficult compared to the past years. Plus…..don’t you reckon the motion section of the 2010 and 2011 exam were very similar…weird…the pictures were very alike…
Yeah I think the exam was too long…but question wise it wasn’t really that hard cept for some of the electronics one…
By the time I got to my detailed study(special relativity) i had about 15 mins….from past exam I usualy can do it under that time but the questions where just like paragraphs so i only finished 7 questions….then I come home and realised I forgot to write down which detailed study I did on the multiple choice question sheet…:facepalm:
The only reason it said pen was because they scan the papers onto the computer, so pen would be easier to read. But if the pencil is dark enough, it should be fine.
FURTHER ELECTRONICS WAS BALLSHOT….how can they make structures easy and further elec crazy hard..is it possible for the results to be standardised considering they’ve made a muck up with the difficulty of the detailed studies? because its def not fair that retards get A+ over me due to (essentially) recving bonus 24 marks
Hey guys do u reckon if someone has exam results of B for mid year A for end of year and A+ for sacs they can get around 37 for physics? Not scaled ofcourse…