Wednesday, November 21, 2012

2012 SPM Physics Answer (Paper1)

2012 SPM Physics Answer (Paper1):

1.D 2.B 3.B 4.C 5.D 6.C 7.C 8.A 9.C 10.B
11.B 12.D 13.A 14.B 15.B 16.C 17.A 18.C 19.A 20.D
21.B 22.B 23.D 24.C 25.B 26.C 27.B 28.D 29.C 30.A
31.B 32.C 33.A 34.C 35.D 36.A 37.C 38.D 39.A 40.D
41.A 42.D 43.C 44.D 45.B 46.D 47.A 48.A 49.A 50.B
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54 comments:

  1. UnknownNovember 21, 2012 at 11:12 PM

    Can the. Answer of Q47 be C?
    Since it make me a bit confuse

    ReplyDelete
    Replies
    1. tzesiangDecember 4, 2012 at 10:44 PM

      i don't think so. cause it says free electron.
      the electrons are not free in semiconductors.

      Delete
  2. Kumaran@yogaNovember 22, 2012 at 1:03 AM

    yes i also think so Q47 can be C...

    ReplyDelete
  3. UnknownNovember 22, 2012 at 2:00 PM

    Q 47 C should be more electrons than holes. Since free electrons are electrons that are free, moving around the atmosphere, not attached to the atoms... i guess

    ReplyDelete
  4. YumikoNovember 22, 2012 at 2:58 PM

    47 should be C right ? Because n-type semiconductor is doped with antimony .. Its not doped with pentavalent atoms.. Pentavalent atoms its the TYPE of atom in n-type semiconductor..

    ReplyDelete
  5. UnknownNovember 22, 2012 at 5:06 PM

    no.. in n-type only have more electrons then usual.. there are no any holes..!! so 47 A is correct..!

    ReplyDelete
  6. syafiqah.November 22, 2012 at 5:07 PM

    It is not necessarily doped with antimony. Any five valence electron will do. Answer's A.

    ReplyDelete
  7. FRIEZNovember 22, 2012 at 5:32 PM

    may i ask something...
    for paper 3...
    section b...
    question 3..
    if i wrote my inference like this: the pressure of gas is affected by the volume of object..
    is it acceptable or not?
    i am very worry about it..
    when i checked my book,it said that the aanswer should be:
    the gas pressure is affected by the volume of air...
    aaaarrghhh..
    please explain to me

    ReplyDelete
  8. UnknownNovember 22, 2012 at 6:22 PM

    Q 47 should be C cause only Pentavalent atoms that are about the same size can be doped

    ReplyDelete
  9. UnknownNovember 22, 2012 at 9:11 PM

    From wiki
    The answer for Q47 can be A and C
    I think both are accepted....

    ReplyDelete
  10. Master YodaNovember 23, 2012 at 8:10 AM

    the pressure of gas is affected by its volume as long as gas temperature is constant...

    IF u wrote "the pressure of gas is affected by the volume of object", it is not correct since object can be solid, liquid or gas...

    So, the answer is about Boyle's Law...Boyle's Law is one of the famous Gaseous Laws...So, it specifically ask about gas...

    Thanks

    ReplyDelete
    Replies
    1. FRIEZNovember 23, 2012 at 9:52 AM

      thank you..
      i guess my answer was wrong..
      i hope i can still get A for physics..
      hopefully..
      :'(

      Delete
  11. FRIEZNovember 23, 2012 at 9:57 AM

    ohh...one more question..
    if my inference,hypothesis,aim and my manipulated variable were wrong....
    is it i cannot get any mark from section b or i can still get marks from other questions (rv,fv,arrangement of apparatus,procedure,tabulation of data and analysing the data?

    ReplyDelete
  12. UnknownNovember 23, 2012 at 10:19 AM

    number 41 confirm is A some say B wor

    ReplyDelete
    Replies
    1. UnknownNovember 24, 2012 at 12:36 AM

      Answer sould be A

      Delete
    2. acsyNovember 29, 2012 at 2:50 PM

      changing the polarity only changes the direction of deflection of wire

      Delete
  13. lOvENovember 23, 2012 at 12:07 PM

    In paper 2,which flag pole is most suitable(question 9)

    ReplyDelete
  14. FRIEZNovember 23, 2012 at 3:20 PM

    i chose flag pole s...
    i think it is most suitable....

    ReplyDelete
    Replies
    1. lOvENovember 23, 2012 at 4:36 PM

      why not flag pole P?

      Delete
    2. FRIEZNovember 23, 2012 at 8:36 PM

      i am also confused by the question...
      the most complicated thing is about the angle.. iam worry about it too..

      Delete
  15. lOvENovember 23, 2012 at 4:38 PM

    please let me know which flag pole is most suitable with relevant physics concepts..
    i need to know it..

    ReplyDelete
  16. UnknownNovember 23, 2012 at 5:35 PM

    as for the paper 3 question 4,if i use thickness of wire as the manipulated variable,is it wrong?? should I use length or diameter??

    ReplyDelete
    Replies
    1. lOvENovember 23, 2012 at 6:02 PM

      This comment has been removed by the author.

      Delete
  17. NoelleNovember 23, 2012 at 5:59 PM

    Hi...for the flag pole, I chose the second one...but my friends said the pole needs to have a high density to avoid getting blown away by wind or something >.<....but imo the pole needs to have a high elasticity right?

    so which one is the most suitable one?...the 2nd one or the 4rd one??

    ReplyDelete
  18. FRIEZNovember 23, 2012 at 8:33 PM

    This comment has been removed by the author.

    ReplyDelete
  19. FRIEZNovember 23, 2012 at 9:23 PM

    one more thing..
    for question paper 2..
    heat capacity question..
    given the mass of water is 0.5 kg,average heat absorbed is 16 js-1.the time taken is 25 minutes,how to calculate the heat absorbed? iam a bit confused.please show your work too..
    thank you..

    ReplyDelete
    Replies
    1. jameskoolerNovember 24, 2012 at 12:51 AM

      i just multiply 16js-1 and (25x60)s i think so not so sure BUT this is my answer

      Delete
    2. jameskoolerNovember 24, 2012 at 12:56 AM

      the mass is used in finding the temperature change

      Delete
    3. FRIEZNovember 24, 2012 at 9:21 AM

      your work is the same with me...
      i am glad to know that...
      ^_^ thank you....

      Delete
  20. ParminderNovember 23, 2012 at 9:31 PM

    42 is B for sure.. Its heavy industry for sure...it will be a STEP UP transformer.. go and check ur text books for posting this answers

    ReplyDelete
    Replies
    1. UnknownNovember 24, 2012 at 12:39 AM

      It is D
      1st they need to set up the voltage from 48kw to 138kw thn set down to 3k(industry) thn set down agn to 420(home)

      Delete
  21. jameskoolerNovember 24, 2012 at 12:53 AM

    and since heat absorbed is what they want and the only info we had is 16js-1 and 25 minutes so we multiply them to get rid of the s and left the j

    this is how i do it dunno whether wrong or right but i hope my phy can get A also

    ReplyDelete
  22. lOvENovember 24, 2012 at 11:50 AM

    your calculation exactly correct.If i'm not mistaken,the total energy absorbed is = 24000j

    ReplyDelete
  23. UnknownNovember 24, 2012 at 6:38 PM

    how about the raise in temperature

    ReplyDelete
  24. UnknownNovember 24, 2012 at 6:39 PM

    i mean for the specific heat capacity the temperature change is how many

    ReplyDelete
    Replies
    1. lOvENovember 24, 2012 at 8:14 PM

      Q=MC0

      24000X(0.5KG)/4.2=raise in temperature

      Delete
    2. TANovember 24, 2012 at 10:02 PM

      That is (QXM)/C. What does that equal to??

      It should be Q/MC=O.

      (4200J kg-1 X 0.5 kg) = 2100 J

      24000 J/ 2100 J = 11.43 degrees celcius.

      Delete
    3. lOvENovember 25, 2012 at 10:24 AM

      sorry, i did wrongly.. it should be as u said..
      me too get same answer 11.43 degrees celcius

      Delete
  25. TANovember 24, 2012 at 9:58 PM

    Physics flagpole? P Q R S? I did S! What is the answer? I thought flagpoles shouldn't be so flexible? The flex should be low and the density High. Its funny cos i ask my friends why they wanted the density to be lower and they said because "senang nak angkat". I LAUGHED SO HARD. READ THE DAMN QUESTION, it's about building a flagpole that can withstand strong wind. lol. Whether or not we want to angkat is out of the question. Even then, What's your answer?

    I did Q

    Flex - Low - Don't want it to be moved too much by wind because personally, I've never seen a flagpole moving left and right in a golf match because of strong wind. lol

    Density - High - Obviously everyone knows why

    Maximum tension of string - High - Obvious

    Position of string tied to pole - High - Obvious

    ----------------------

    What's everyone elses answer?

    -----------------------

    Btw, for specific heat capacity,

    I did Q=MCO

    This means (0.5x4200) is MC

    Q = 24000

    24000 divide by (0.5x4200) equals 11.43 degrees celcius.

    ------------------------------

    lOvE is wrong on this part. She did (Q X M)/C which does not equal to anything.

    ReplyDelete
    Replies
    1. TANovember 24, 2012 at 9:59 PM

      Ooops,sorry. I did S, not Q.

      Delete
    2. lOvENovember 25, 2012 at 10:27 AM

      nop.. actually i also gt same answer.. here i showed the wrong calculation.. the answer is 11.43

      Delete
  26. sarahraneeNovember 25, 2012 at 9:33 AM

    This comment has been removed by the author.

    ReplyDelete
  27. sarahraneeNovember 25, 2012 at 9:51 AM

    is it a golf flag pole or normal flag pole? coz if its a golf flag pole then most probably its light and flexible. if normal then i dont know

    ReplyDelete
  28. UnknownNovember 25, 2012 at 9:56 AM

    how about the wave part essay answer the specification

    ReplyDelete
    Replies
    1. sarahraneeNovember 25, 2012 at 10:07 AM

      ooo came out 2007 part C..
      my ans
      Electromagnetic wave - travel further
      High frequency(not sure, because I learn in ICT if high frequency the signals will be blocked by UV ray but according to the 2007 physics answer.. high frequency - higher energy)
      receiver thingy at focal point of parabolic reflector- stronger signal
      diameter big - reflect more signal
      the satellite located high above the ground - less interference

      Delete
  29. UnknownNovember 25, 2012 at 10:25 AM

    yay we got almost the same answer :)

    ReplyDelete
    Replies
    1. lOvENovember 25, 2012 at 10:40 AM

      type of wave is electromagnetic wave or should state specifically as microwave?

      Delete
  30. UnknownNovember 25, 2012 at 11:22 AM

    This comment has been removed by the author.

    ReplyDelete
  31. UnknownNovember 25, 2012 at 11:56 AM

    if put the transmitter and receiver placed at focal length can?

    ReplyDelete
  32. UnknownNovember 25, 2012 at 2:53 PM

    can anyone reply me if i put the height must be high for the category to enable wave to propagate in longer distance isit ok?

    ReplyDelete
  33. AnnaAmethyst5366November 25, 2012 at 6:36 PM

    What is the manipulated and responding variable on the experiment of volume and pressure on gas. Is it okay if the responding become manipulated variable and vice saver???

    ReplyDelete
  34. gdNovember 26, 2012 at 11:22 PM

    probability to get A-

    p(A-)=133/190 p(E)=190-133
    =0.7 =0.3

    (190/100)x70=133
    p1=44
    133-44=89
    p2+p3=89
    p2(x=60)=89-60
    =29

    p3=29

    ReplyDelete
  35. ♥ Grace Tan ♥December 7, 2012 at 11:18 PM

    Dear teacher ,

    my phy paper 1 get 43 correct only..do i stll have chance to get A+ ???

    ReplyDelete
  36. UnknownJuly 17, 2018 at 6:13 PM

    Hello,who have the answer about physics spm 2011

    ReplyDelete

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