Unit 4 Physics Edexcel A2 and Edexcel IAL

yes

when you explain what an electric field is, do you say an area where a charged particle experiences a force or an area where a proton experiences a force?

Started ppers yesterday. Anyone doing papers a few times?
That is my aim lol!


Posted from TSR Mobile

Started ppers yesterday. Anyone doing papers a few times?
That is my aim lol!


Posted from TSR Mobile

Started ppers yesterday. Anyone doing papers a few times?
That is my aim lol!


Posted from TSR Mobile

Started ppers yesterday. Anyone doing papers a few times?
That is my aim lol!


Posted from TSR Mobile

Yeah it really helps! Also AQA multiple choice questions are really good because some of them are quite weird and obscure and make you think differently about certain topics

Do you have a link?

http://www.physicsandmathstutor.com/past-papers/a-level-physics/aqa-unit-4/
(These all contain fields and Further Mechanics. All the papers labelled 4A have a long multiple choice section and 4B contain written answers)

http://www.physicsandmathstutor.com/past-papers/a-level-physics/aqa-unit-1/
(No multiple choice, but these contain particles questions and some AS electricity if you want to revise that too)

http://www.physicsandmathstutor.com/past-papers/a-level-physics/aqa-unit-5/
(This is our unit 5 stuff - part A is astrophysics, part B we don't cover in Edexcel, part C you may find some questions that are Edexcel and the 1 papers cover Nuclear and Thermal Physics)

http://www.physicsandmathstutor.com/past-papers/a-level-physics/aqa-unit-4/
(These all contain fields and Further Mechanics. All the papers labelled 4A have a long multiple choice section and 4B contain written answers)

http://www.physicsandmathstutor.com/past-papers/a-level-physics/aqa-unit-1/
(No multiple choice, but these contain particles questions and some AS electricity if you want to revise that too)

http://www.physicsandmathstutor.com/past-papers/a-level-physics/aqa-unit-5/
(This is our unit 5 stuff - part A is astrophysics, part B we don't cover in Edexcel, part C you may find some questions that are Edexcel and the 1 papers cover Nuclear and Thermal Physics)

Hi. Would someone help me out in this paper? Was trying it out.
https://60abffc9b401b1c0936e01291c15112cab0778c4.googledrive.com/host/0B1ZiqBksUHNYVFI1YlJBOWhwRW8/January%202010%20QP%20-%20Unit%204A%20AQA%20Physics.pdf
I need help in Q21 and Q25

Q21 - Work out the number of electrons in the conductor by finding the volume and then multiplying by 8x10^28. You can then use F=BIL to work out the total force acting on the conductor and divide this number by the number of electrons.

Q25 - The plane is travelling at 150 metres per second. As the plane is flying, think about it travelling through a rectangle of 150m x 60m every second. You can then use Magnetic flux = BxA. As e.m.f. = change in magnetic flux/change in time, as the change in time is 1 second then the value you get for the magnetic flux is simply the value for the induced e.m.f.

For using FLHR for any conducting object moving in a magnetic field, think of the moving object itself as being a "flow of positive charge", so instead of pointing your thumb in the direction of motion of the plane you point your second finger in that direction instead and use your thumb to work out the direction of force acting on the positive charges and thus which wing will become positively charged.

After the plane reaches a constant velocity, the change in magnetic flux becomes zero as there is no acceleration, so there is no emf induced in the wings and thus no buildup of charge.

Hello, would someone help me out in these questions(2,10 and 14b) in the paper I posted below?

https://ad57adc4f6eb5ea42b541057f16290e611d4e42b.googledrive.com/host/0B1ZiqBksUHNYcHRSNUJpeFpqNXM/June%202014%20(IAL)%20QP%20-%20Unit%204%20Edexcel%20Physics.pdf

for 2) take note that it says DIAMETER is 22 cm. Then use w= 2pi (x6.5)/1, then use V=r w (where r is diameter/2)
10) you get energy as E=mc^2.
To convert J to eV divide by e and then divide by 10^9 to get Giga.
14b) I think it's energy conservation law. The energy after collision is greater, as I remember, but according to the law initial=final total energy.
Not sure about the significance part :3 Check the mark scheme for that pls

Why not just use Fleming's RIGHT hand rule?