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OCR Physics Unit 2 - G482 - (June Exams Preparation)

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Really would appreciate an unofficial mark scheme :frown:


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Reply 1021
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Mule
6
I just want to see the paper :/
Reply 1022
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Gotzz
13
Original post by yodawg321
Was your watch length like 15.5?


I guess you mean wavelength?
I can't remember, but I know it was x10^-9
Think it went ok, could have gone better but yeah, grade boundaries are low so yay


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What did you guys get for the v=krootT


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Original post by Gotzz
I guess you mean wavelength?
I can't remember, but I know it was x10^-9


Yeah sorry, De Broglie wavelength?
Reply 1026
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Gotzz
13
Original post by yodawg321
Yeah sorry, De Broglie wavelength?


Yeah, I'm not sure but it was x10^-9 and the spacing was something x10^-10
Original post by yodawg321
Was your watch length like 15.5?


watch length ahahah, wow
What question was this for?
Reply 1029
Avatar for ashleab_
ashleab_
unofficial mark scheme anyone?
Original post by Gotzz
Yeah, I'm not sure but it was x10^-9 and the spacing was something x10^-10


Same :smile:


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Original post by ashleab_
unofficial mark scheme anyone?

please
Not having this mark scheme is killing me! :/
Reply 1033
Avatar for ashleab_
ashleab_
feel like i've done so bad at this rate. someone upload a mark scheme?
Omg for that first Resistivity question, the shape had dimensions:
width: 1.2*10^-3
length: 1.5*10^-2
height: 1.5*10^-2

Instead of finding the Cross-Sectional Area, I, for some stupid reason, found the volume of the cuboid. s***, s***, s***.

Such easy marks lost.


also got 1500 and 4500 for the other Resistance question!
Reply 1035
Avatar for zcanf
zcanf
errrrrrgh, i had all my answers saved within matrices on my calculator and now i've accidently swiped the memory! My life is in tension for now:frown:
Original post by Hannahm1995


i remember getting something times 10^-9 for the wavelength too but doesn't it cause a diffraction grating because the wavelength is greater than the graphite spacing which was something x10^-10? or am i completely off point? also did any of you get something like 80% for the percentage efficiency question?
Someone please answer, omg, haha.

What did you get for v=k root T question?
about the speed, initially 0.94ms^-1
(Not sure if that's the write question actually haha)
I did V=F*lamba
so v is directly proportion to lamba, so if frequency increases by 2 the speed would also increases by 2
2*0.94 ms^-1? :/ probs got the wrong end of the stick
Original post by motivatedshroom
Someone please answer, omg, haha.

What did you get for v=k root T question?
about the speed, initially 0.94ms^-1
(Not sure if that's the write question actually haha)
I did V=F*lamba
so v is directly proportion to lamba, so if frequency increases by 2 the speed would also increases by 2
2*0.94 ms^-1? :/ probs got the wrong end of the stick


Think that must be right, I did it and a lot of people I know
Original post by Fredjames1
i remember getting something times 10^-9 for the wavelength too but doesn't it cause a diffraction grating because the wavelength is greater than the graphite spacing which was something x10^-10? or am i completely off point? also did any of you get something like 80% for the percentage efficiency question?


I got 80%

3600-720/3600 time 100 =80%

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