Physics: Post your doubts here!

[princess Anu]

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[princess Anu]

..

 

[switneesh]

Hi.Can anyone help me to find the uncertainty in v^2 in question 2. http://papers.xtremepapers.com/CIE/...nd AS Level/Physics (9702)/9702_w11_qp_53.pdf
Thanks.

 

[janasalem]

how to know how many significant figures i should write coz sometimes in the marking scheme they only give one answer

 

[switneesh]

delta(v^2) / (v^2) = 2 [delta(v) / v]

So, delta(v^2) = 2 [delta(v) / v] x (v^2)

Thank you very much.

 

[Ruman Wajih]

N

Coursebook has everything fruitful. Nothing to skip. You didn't liked it?

no but i need some other ones for easy reference.

 

[Thought blocker]

N

no but i need some other ones for easy reference.

Do you have access on youtube?

 

[The Sarcastic Retard]

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..

Are they A level questions?

 

[The Sarcastic Retard]

both are explained at
http://physics-ref.blogspot.com/2014/11/physics-9702-doubts-help-page-12.html

Are they A level questions?

 

[princess Anu]

Yes

Are they A level questions?

 

[The Sarcastic Retard]

A-level. why???

Yes

Which paper was it?

 

[princess Anu]

I don't remember, they are from the classified.

 

[The Sarcastic Retard]

references are included at http://physics-ref.blogspot.com/2014/11/physics-9702-doubts-help-page-12.html

Thank you.

 

[The Sarcastic Retard]

1987 / I / 5 <---------- What does it mean?

 

[XRDXRD]

Hi , I need help

9702/11/M/J/14
Q13,31,

9702/12/M/J/14
Q10, 15, 18, 23,30,35

9702/13/M/J/14
Q14, 16,23,35,38

Thank You in advance

 

[Thought blocker]

Hi , I need help

9702/11/M/J/14
Q13,31.

Thank You in advance

13)
900x0.2=180Nm
the torque by F will be Fx1.2=180
hence F will be 150N
31)
Energy transfer = I²Rt = (40 x 10⁻³)² x 250 x 60 = 24J and During this time 6.0J of energy is lost in the
internal resistance. The battery must therefore supply a total of 30 J of energy to the whole circuit.
Q = It
Q = (40 x 10⁻³)² x 60 =2.4C
and so the e.m.f. of the battery is (30J / 2.4C) = 12.5V.

 

[umer salman]

aoa thank you admin for the help, but the Paper 2 & Paper 4 : http://www.mediafire.com/?g65j51stacmy33c, link is not working please uplode the file again or send me a new link

Hi everyone, AsSalamoAlaikum Wr Wb...

To get things organized in a better way, I am making this thread. As othewise, some queries remain unanswered!

So post your PHYSICS doubts in this thread. InshaAllah other people here will help me and you all.

NOTE: If any doubts in the pastpapers, please post the link! You can find links here!

Any Physics related notes and links will be added here in this post. Feel free to provide the links to your notes around the forum, or any other websites!
Thanks!
Jazak Allah Khair!

Physics Notes:

Some links & Notes - by destined007

As physics p1 MCQS YEARLY Solved [explaination]
Physics Practical Tips - by arlery

Notes for A2 Direct Sensing (Applications) - shared by sweetiepie

Physics Summarised Notes (Click to download)

AS and A-Level Physics Definitions

A2: Physics Revision notes - by smzimran

Paper:5 Finding uncerainty in log - by XPFMember

Physics Paper 5 tips - by arlery

Physics Compiled Pastpapers: <Credits to CaptainDanger for sharing this..>

Here are the compiled A level topical Physics questions in PDF form...

Paper 1 : http://www.mediafire.com/?tocg6ha6ihkwd

Paper 2 & Paper 4 : http://www.mediafire.com/?g65j51stacmy33c

(Source : http://www.alevelforum.com/viewtopic.php?f=15&t=14)

 

[umer salman]

can any one help me with the compiled topical for paper 2

 

[Thought blocker]

can any one help me with the compiled topical for paper 2

 

[Bba321]

check http://physics-ref.blogspot.com/2014/11/physics-9702-doubts-help-page-13.html

one of them is answered there

Thanks
Also please help with qs 2,16 and 35

papers.xtremepapers.com/CIE/Cambridge%20International%20A%20and%20AS%20Level/Physics%20(9702)/9702_w12_qp_13.pdf