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AQA PHYA4 ~ 16th January 2013 ~ A2 Physics

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hey guys what did u write fr the last 2 questions of how the time will be affected, i said that both will decrease because less emf induced, so less opposition

That's what I put too, but only the magnetic one is reduced and the other stays the same. I recon I got 2/6 for that question.

Reply 1581

Mystic Creature

Original post by posthumus

Now... Which one of you beautiful people got 38s for double pendulum MC question??

This was posted from The Student Room's iPhone/iPad App

I did!! But I guessed it.

And bloody hell, that was a difficult paper.

Reply 1582

Pindi95

Original post by Tedfoo25

Me! And I'm fairly sure its right, I really really liked this M/C

Yeah, I found the M/C surprisingly nice, it was Section B that caught me out but everybody else seemed to find the M/C difficult

Posted from TSR Mobile

Reply 1583

Pinkhead

Original post by ehtisham_1

hey guys what did u write fr the last 2 questions of how the time will be affected, i said that both will decrease because less emf induced, so less opposition

P stays the same, Q decreases.
p wasn't magnetic.

Reply 1584

Tedfoo25

Original post by Pindi95

Yeah, I found the M/C surprisingly nice, it was Section B that caught me out but everybody else seemed to find the M/C difficult

Posted from TSR Mobile

I'm glad we agree!

Reply 1585

Mystic Creature

Original post by Pinkhead

P stays the same, Q decreases.
p wasn't magnetic.

Woo hoo that's what I wrote :biggrin:

Reply 1586

JJMills

Original post by posthumus

Now... Which one of you beautiful people got 38s for double pendulum MC question??

This was posted from The Student Room's iPhone/iPad App

How did you arrive at 38s?

Reply 1587

Turbintajj

That was a train wreck from start to finish.

This was posted from The Student Room's iPhone/iPad App

Reply 1588

ehtisham_1

Original post by Pinkhead

P stays the same, Q decreases.
p wasn't magnetic.

it was magnetic, but q was a stronger magnet, ive got the question paper next to me

Reply 1589

Pinkhead

Original post by ehtisham_1

it was magnetic, but q was a stronger magnet, ive got the question paper next to me

Why would you have the paper next to you?
And are you sure, don't remember them mentioning P's magnetism at all.

Reply 1590

Tedfoo25

Here is the A* Boundary out of 75 for an A* the past 5 exams:

Jun 10: 54
Jan 11: 56
Jun 11: 56
Jan 12: 57
Jun 12: 57

Notice that the grade boundary is going up, despite the papers getting harder. BLOODY MICHAEL GOVE. :angry:

I recon we can expect the grade boundary to be 58 or 59. :cool:

Reply 1591

Kenna

Nowhere did it say that p was magnetic?

Reply 1592

und

Original post by ehtisham_1

it was magnetic, but q was a stronger magnet, ive got the question paper next to me

Aluminium is not magnetic.

Reply 1593

kitkat19

Is it likely that an unofficial markscheme is going to be made?...

Reply 1594

Pinkhead

Original post by Kenna

Nowhere did it say that p was magnetic?

It didn't say it. Aluminiium is not a magnetic metal.

Reply 1595

kitkat19

Original post by und

Aluminium is not magnetic.

scan in the paper and post it on here?...you will be loved and probably get like 1000 rep from people? xD

Reply 1596

henryoloyede

Didn't find it that hard but now everyone's saying it was a nightmare I feel like I got everything wrong...

Posted from TSR Mobile

Reply 1597

ehtisham_1

Original post by Pinkhead

Why would you have the paper next to you?
And are you sure, don't remember them mentioning P's magnetism at all.

lol they give us it after exam, in the question it says that q is a stronger maget, which implies that p is magnetic but weaker.

Reply 1598

Mystic Creature

People! For the one where you had to work out the height of the satellite above the surface of the Earth, what answers did you get?

I did it like this:

Found out constant of proportionality using r and T of low polar orbit
Then used that k to find out r^3/2, with T obviously being 60*60*24.
Found out r by doing the cube root of the square of k*T
Then took away the radius of the Earth to find the final height.

But I just can't remember what this value was!

Reply 1599

Kenna

I kind of cocked up, but did not cock up the first question on section B.... I did not use the mass of a neutron/ proton and just went off the ratio of how many protons and neutrons combined that the alpha particle and CE nucles actually had... It still got me a 3% value and a velocity which I can't remember off the top of my head.