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AQA PHYA4 ~ 13th June 2013 ~ A2 Physics

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For the third question it asked which was incorrect and if it's an elastic collision wouldn't the change in momentum be 2mv

yeah i thought that but then it said the change in the magnitude of the momentum, and as momentums conserved i thought it would be 0, if it was just the change in momentum i'd have put that too....i'm probably overthinking it though and you're right! what direction was the magnetic field with the dees? i said it was coming up from the page?

Reply 621

J_W-x

After getting completely **** all over by C3 seeing some of these answers are making me feel better

Reply 622

cooldudeman

Original post by J_W-x

After getting completely **** all over by C3 seeing some of these answers are making me feel better

Edexcel are pissed

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Reply 623

Dirtybit

Original post by shewhomustnotbnamd

Ahh who knows I can't even remember what I put for that one :confused:

Reply 624

The H

The only multiple choice question I guessed was the gravitational potential on mars one.
I left it until the end because I literally couldn't be bothered to answer it :rolleyes:

Reply 625

fizzbizz

What did people get for the final transformers multiple choice question? 460 turns and less than 0.26A?

Reply 626

Jack93o

anyone remember that earth, sun, moon gravitational field question in section A?

whats the answer?

Reply 627

fizzbizz

Original post by The H

The only multiple choice question I guessed was the gravitational potential on mars one.
I left it until the end because I literally couldn't be bothered to answer it :rolleyes:

3.6 I think I got for that

Reply 628

fizzbizz

Original post by Jack93o

anyone remember that earth, sun, moon gravitational field question in section A?

whats the answer?

I got Earth > Sun > Moon

Reply 629

Jack93o

Original post by fizzbizz

I got Earth > Sun > Moon

what was that, B?

Reply 630

Hog Dog

Original post by fizzbizz

What did people get for the final transformers multiple choice question? 460 turns and less than 0.26A?

Correct. Edit: my bad, has to be more than that other efficiency becomes >100% and that's not possible! :colone:

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(edited 10 years ago)

Reply 631

The H

Original post by Jack93o

anyone remember that earth, sun, moon gravitational field question in section A?

whats the answer?

I got E > M > S but i'm not 100% sure

Reply 632

LauraCompton

Original post by The H

I got E > M > S but i'm not 100% sure

I got that as well

Reply 633

fizzbizz

Original post by Jack93o

what was that, B?

A I think

Reply 634

Arihant

For the last question i got 0.something. I personally think that anyone with the amswer of greater than 1 tesla would be wrong as 1 tesla(according to the book i use) is am extremely large value and so teslas are usually 0.something.

For the last question about working out the angle i put 60 deg and i got 1500 rpm.

To work out the emf I worked out the gradient of the graph. Which I thought was straightforward as i compared the 1st graph with the 2nd one and saw that the point where the emf is peaking is when the flux graph is passing through zero, and hence the graph has a small region where is a straight line, hence you could do change in y over change in x

Reply 635

shewhomustnotbnamd

Original post by Jack93o

anyone remember that earth, sun, moon gravitational field question in section A?

whats the answer?

i put sun>earth> moon coz i remembered from somewhere that the gravitational force of the sun on the moon is almost double the earth's on the moon so i assumed the same here.... :frown: