AQA Physics PHYA4 - Thursday 11th June 2015 [Exam Discussion Thread]

Thanks, so am i right in thinking that it would take longer for a magnet to pass through an incomplete coil than to free fall?


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Hello everyone!

I was wondering if anyone could help me on a question that I was stuck on.

Its is Q10 Jan '04 in the following link. I do not understand why C is the answer.

No Because in an incomplete circuit there's no current induced hence there's no opposing (force)magnetic field to slow it down. So if it's a vertical fall acceleration will be just g

Look on the data sheet - E = Q/4pier², so doubling r quarters E. V=Q/4pier, so doubling r halves V.

My teacher told me that we'll be provided an extra answer sheet to write our answers down for Section A.

Does anyone knows what it looks like?

I do not want to find out on the very day I sit the exam.

Yes, we used one for our mock (if I find that I have the sheet when I'm at home tonight I'll take a photo and post it in the thread), but it has I think a details section at the top (name etc), numbers 1-50 (presumably for different papers)down the page with four dots next to them labelled A-D. You colour in the correct dot (in pen) to indicate your answer - any working etc do on the question paper (which does have the advantage of meaning you can write all over it!).

• The ratios of gravitational field strength equals the ratio of the masses divided by the ratio of the radii squared.

• the mass is proportional to the product of the density times volume, and hence proportional to the density times radius cubed:

• The ratios of gravitational field strength equals the ratio of the densities multiplied by the ratio of the radii cubed divided by the ratio of the radii squared.

Cancelling top and bottom (cubed and squared terms):
• The ratios of gravitational field strength equals the ratio of the densities multiplied by the ratio of the radii.

• Dividing the ratios of gravitational field strength by the ratio of the densities gives 6 divided by 5/3 which is 3.6.


Posted from TSR Mobile

Ah thanks a lot ☺ it'd be great if you could upload a picture, should you find it, because I don't think my teacher showed us.

Hi can anyone explain what should the angle be between. I came across a multiple choice question where they had given us a wrong angle and we had o workout the right one but i don't understand the angle should be between? Thanks

spec : energy considerations for an orbiting satellite?

Can anyone remind me how to work out Q13 in this paper?
http://filestore.aqa.org.uk/subjects/AQA-PHYA4-1-W-QP-JUN10.PDF

It is between the normal of the coil and the uniform magnetic field.



I hope that helps

Thanks, how did your c3 exam go


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Guys?