A2 Physics | Questions and Doubts [Post Here]

[sweetjinnah]

Can someone plz help me with this
http://papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Physics (9702)/9702_w11_qp_43.pdf
Q5A.thanks a lot?!

 

[sweetjinnah]

Somebody pleaasee help. sweetjinnah ? periyasamy

can i ans u these by tomorrow.. vl have to write alot dun mind

 

[unique111]

Yeah sure! Thanks. And also the one in physics doubt thread. Could you explain the diagrams?

 

[Yousif Mukkhtar]

Can somebody explain q11 b)
http://papers.xtremepapers.com/CIE/...nd AS Level/Physics (9702)/9702_w12_qp_41.pdf

 

[sweetjinnah]

Somebody, please help?
http://papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Physics (9702)/9702_s12_qp_42.pdf
Question 4ai and ii)
Question 1cii) why is change in gravitational potential energy=Fx?

http://papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Physics (9702)/9702_s12_qp_41.pdf
Ques 4b) and 1c)

http://papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Physics (9702)/9702_s10_qp_42.pdf
Ques 5bii)

http://papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Physics (9702)/9702_s10_qp_41.pdf
Ques 4bii)

http://papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Physics (9702)/9702_s08_qp_4.pdf
Ques 4c)

http://papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Physics (9702)/9702_s07_qp_4.pdf
Ques 4cii)

http://papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Physics (9702)/9702_s12_qp_42.pdf
Question 4ai and ii)
Question 1cii) why is change in gravitational potential energy=Fx?
Q4ai) The pe increases as the distance b/w the mass nd proton, r increases. This means mass is -vely charged, there is attraction.
a ii) G= Up/r Up/r= F... G=Eq
Q1cii) u can find energy using Fx... so Energy=Fx...
http://papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Physics (9702)/9702_s10_qp_42.pdf
Ques 5bii) in this on one capacitor V= 3V cz 1/2 of 6 =3V now add 3V+6V =9V
http://papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Physics (9702)/9702_s08_qp_4.pdf
Ques 4c)
Force = Q*E nd E= V/x the gradient of the graph now force is proportional to gradient the steeepest the graph the larger the force... so at x=27cm the force is largest cz steepest gradient.
http://papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Physics (9702)/9702_s07_qp_4.pdf
Ques 4cii)

 

[sweetjinnah]

View attachment 40345
Can anyone plz explain this? Ans is 9 V

 

[periyasamy]

Can somebody explain q11 b)
http://papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Physics (9702)/9702_w12_qp_41.pdf

View attachment 40345
Can anyone plz explain this? Ans is 9 V

I am sorry but what year is this paper.Just want to refer back.Thanku.

 

[unique111]

http://papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Physics (9702)/9702_s12_qp_42.pdf
Question 4ai and ii)
Question 1cii) why is change in gravitational potential energy=Fx?
Q4ai) The pe increases as the distance b/w the mass nd proton, r increases. This means mass is -vely charged, there is attraction.
a ii) G= Up/r Up/r= F... G=Eq
Q1cii) u can find energy using Fx... so Energy=Fx...
http://papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Physics (9702)/9702_s10_qp_42.pdf
Ques 5bii) in this on one capacitor V= 3V cz 1/2 of 6 =3V now add 3V+6V =9V
http://papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Physics (9702)/9702_s08_qp_4.pdf
Ques 4c)
Force = Q*E nd E= V/x the gradient of the graph now force is proportional to gradient the steeepest the graph the larger the force... so at x=27cm the force is largest cz steepest gradient.
http://papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Physics (9702)/9702_s07_qp_4.pdf
Ques 4cii)View attachment 40427

Thanks yo!

 

[sweetjinnah]

Thanks yo!

n.p.

 

[hope4thebest]

View attachment 40428

TYSM sister but why did you multiply 1/2 with 6? What logic is applied here?

 

[sweetjinnah]

MemoryMatrix 21

 

[itallion stallion]

View attachment 40371

Can u plz explain this part in detail.
http://papers.xtremepapers.com/CIE/...nd AS Level/Physics (9702)/9702_w11_qp_43.pdf
Question 6 part bii.
Thanks a lot!

 

[falak123]

heyy.....the one question u explained above the capacitor one (s/42/10/q5 bii) i dont get plz could u explain a little more and help in these quetions too
may 2009 p4 q9b and oct/10/v43/q2cii here why is E taken as 1.2*10^-14?

 

[lisahamed]

http://papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Physics (9702)/9702_s09_qp_4.pdf
no.9 (b) anyone?
sweetjinnah

 

[lisahamed]

In the coursebook, it is written that the amplitude of the carrier wave must be more than half of the amplitude of the signal wave, why is that?

 

[hope4thebest]

http://papers.xtremepapers.com/CIE/...nd AS Level/Physics (9702)/9702_w12_qp_43.pdf
Logic behind Q5(c) (ii) ? Does anyone know? Thanks in advance

 

[Talha Khatri]

View attachment 40345
Can anyone plz explain this? Ans is 9 V

Understand that this is the maximum the voltage can be increased because if you go any further, the capacitors in box A will be overloaded and blow.

And guys, we need to help each other out here. I see most people just posting questions, try to look around the thread and see if you know any of the questions, if you can solve them help a brother or sister out! That's how we can all learn

 

[hope4thebest]

Understand that this is the maximum the voltage can be increased because if you go any further, the capacitors in box A will be overloaded and blow.
View attachment 40905
And guys, we need to help each other out here. I see most people just posting questions, try to look around the thread and see if you know any of the questions, if you can solve them help a brother or sister out! That's how we can all learn

Ty your concept is correct but you quoted the wrong formula. C=Q/V it is

 

[Talha Khatri]

Ty your concept is correct but you quoted the wrong formula. C=Q/V it is

Oh I'm sorry my bad, just a silly mistake

 

[Harsh Poddar]

I've made this site that can help you to quickly access past papers for a few common subjects. Try it out and please leave a feedback by clicking on my name below the website.

http://server-poddarh.rhcloud.com/paper.html