IAL Edexcel A2 Physics June 2019 (Old syllabus)

Original post by sickomode

yap it was hard
so predicting this paper to be easy hopefully

Hopefully 🙏🙏🙏

Reply 21

Meet1173

6

Anyone with the predictions for unit 6 ??

Reply 22

amal29

Does anyone know why the answer for this is A?

Screenshot 2019-05-16 at 9.22.33 PM.png

Reply 23

joeahmed$01

6

Original post by amal29

Does anyone know why the answer for this is A?

Screenshot 2019-05-16 at 9.22.33 PM.png

flux linkage = B * A * number of turns

B is 0.40T
A is area of a square, so 0.060²
There are 50 turns

Reply 24

image-456cfde0-db6b-4e32-8e5f-70fd285bfeca315295431-compressed.jpg.jpeg

image-dbefe81c-1374-4461-8d5c-a0b4c90c80221467906070-compressed.jpg.jpeg

last line in ms it says coil experiences force, shouldn't it be cone instead of coil?

Reply 25

amal29

gotcha. Thank you!

Original post by joeahmed$01

flux linkage = B * A * number of turns

B is 0.40T
A is area of a square, so 0.060²
There are 50 turns

Reply 26

Maya$tudent

D9053745-596A-481A-89F4-3D83A7484B42.jpg.jpeg27.5KB

Can someone please explain why this is to me?

Reply 27

Jaguar1200

15

Positron has rest mass 9.11 × 10^-31 KG right. After acceleration mass increased drastically (like 100× drastically). So energy is way much greater post acceleration. (Kinetic energy). There for velocity is also fast.

Original post by Maya$tudent

Can someone please explain why this is to me?

Reply 28

image-5cb2572c-6c29-47af-8b33-ef92909fcbf1745688938-compressed.jpg.jpeg

how is the surface temperature found ?

Reply 29

image-f1d60841-2b7e-4e5c-bbe9-c8cadd30a6041281137321-compressed.jpg.jpeg

what does the second point mean?

Reply 30

Original post by Presto

Anyone else feel like they forgot everything? TT

I'm dead inside. Honestly, I'd like to have a "word" with whoever invented Capacitance

Reply 31

Original post by Starzzz

what does the second point mean?

White light is in the middle of the visible range, around 550 nm. It's not very small but it's small compared to most stars with IR radiation or Yellow or Red light. Since T'Y' (I have no clue how to do lambda) = a constant, to maintain the constant, if wavelenght is less the temp has to be high

Reply 32

Original post by Erica.kh

White light is in the middle of the visible range, around 550 nm. It's not very small but it's small compared to most stars with IR radiation or Yellow or Red light. Since T'Y' (I have no clue how to do lambda) = a constant, to maintain the constant, if wavelenght is less the temp has to be high

so white dwarfs emit white light at peak wavelength?
for the last point how is high temperature related to small surface area for white dwarf....
a high temp would mean high luminosity
and luminosity and area are proportional

Reply 33

Original post by Starzzz

so white dwarfs emit white light at peak wavelength?
for the last point how is high temperature related to small surface area for white dwarf....
a high temp would mean high luminosity
and luminosity and area are proportional

Did the question give the graph? If yes, then you can say that L is less than L⊙, so L is low. A=L/T (ignoring the constants) so a low L and a high T would mean a small A

Reply 34

Original post by Starzzz

last line in ms it says coil experiences force, shouldn't it be cone instead of coil?

The second line of the question says the coil and cone are attached to each other, so we can assume it to be a single system. So whatever force the coil feels, it is assumed the cone feels the same.

Can you help me understand the last line? 'field interacts with permanent magnets field so coil experiences an oscillating force'. Why is it oscillating?

Reply 35

Jaguar1200

15

Original post by Starzzz

how is the surface temperature found ?

Did they give the peak wavelength anywhere else in the question? (Part a perhaps)
If so your question is answered

Reply 36

Maya$tudent