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

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GOD I screwed up! I'm absolutely broken down right now! (someone cheer me up!) that paper was suppose to be 'relatively easy!' yet I ran out of time! grrrr!

If it makes you feel better, I accidently missed out the last two pages as they were stuck together, so I only had 5 minutes to do them. Definitely failed.
:mad:

Reply 621

JG1027

Original post by leahcee

I put the arrows the opposite direction that they were travelling, if that makes sense? I remember doing it in class once and everyone got it wrong, so we kinda learnt.

same

Reply 622

MelissaW_xo

Original post by J10

Also, for the last question I put infrared first, with UV second.
What did the graph you had to draw look like?
Mine had a period of 0.2s, and I draw 2 full waves, 0-0.2, 0.2-0.4. Also has 0.010, 0.020, 0.030 on the sides (and the negatives of these values on the y-axis)

I got the same as you! Took me a long time to work out though..

Reply 623

bradley-tracey

if anyone could post a link of the paper i will upload module answers.

Reply 624

JamesJJT

Are we allowed to discuss this exam yet? :s-smilie:

Or does the time limit only apply to Edexcel?

EDIT: It's only Edexcel. Learn to read James.

Reply 625

Georgehigginson

Original post by JamesJJT

Are we allowed to discuss this exam yet? :s-smilie:

Or does the time limit only apply to Edexcel?

EDIT: It's only Edexcel. Learn to read James.

we're not allowed and anyone who posts on here will be disqualified

EDIT: Ah you noticed ahaah

Reply 626

MelissaW_xo

Really annoyed now because for the 90degrees difference one I put Y and Z when they are 180 :frown:

just wasn't thinking...

Reply 627

JG1027

was the graph a sine graph? :|

Reply 628

MelissaW_xo

Original post by Georgehigginson

we're not allowed and anyone who posts on here will be disqualified

That's not true - OCR exams are only taken in the UK so you can discuss straight after :smile:

Reply 629

Hannahm1995

Original post by Legal drugdealer

Disgusting paper!

Yep! Horrid :frown:

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Reply 630

Hannahm1995

Original post by Gcayte

Im thinking it'll be as low as 63ish for an A.
As a year 13, that paper was harder than the A2 stuff!

Totally agree! A2 seems to be so much easier than this paper?!

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Reply 631

Georgehigginson

Original post by JG1027

was the graph a sine graph? :|

think i did cos, it started at max amplitude didn't it

Reply 632

Georgehigginson

Original post by Georgehigginson

we're not allowed and anyone who posts on here will be disqualified

EDIT: Ah you noticed ahaah

Stop neg rating me, I was only joking :angry:

Reply 633

Hannahm1995

Original post by seajamiet

What did you guys get for efficiency, i got 80%

I got 85% defiantly wrong :frown:

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Reply 634

Gcayte

Original post by Hannahm1995

Totally agree! A2 seems to be so much easier than this paper?!

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Yeah! I'm really worried now though that Unit 5 will be awful :frown:

Reply 635

Gcayte

Original post by Law-Hopeful

I got total input power as 2880W (P=IV = 120x24 = 2880W), got the power lost as 720W, so got the percentage efficiency as 75%. But apparently it was 80%?

I think you're supposed to use 30V instead of 24V :smile:

Reply 636

J10

What do people think gradeboundaries willl be for an A (and for 130, 140 and 150 UMS)?

Reply 637

JamesJJT

There were 2 questions that really threw me: The Electric Meter for the LDR and using the Double slit instead of two identical light sources. Took me a while to think those through.

For the wave question with WXYZ I put W at max speed, X at rest and W and X for the phase difference of 90 degrees.

Could someone enlighten me as to what happens to the speed of W oscillating when the frequency is doubled?