Physics: Post your doubts here!

[Llamas]

http://papers.xtremepapers.com/CIE/...nd AS Level/Physics (9702)/9702_w09_qp_41.pdf

Question 5, part B2, please!

 

[Bba321]

second one is explained at
http://physics-ref.blogspot.com/2014/09/9702-november-2009-paper-42-worked.html

Thanks

 

[princess Anu]

.

 

[salvatore]

check at
http://physics-ref.blogspot.com/2015/03/physics-9702-doubts-help-page-90.html

Perfect! Thanks xD

 

[Armybrat007]

Casn someone please explain how we eliminate v in two equation whileCalculating the e/m ratio of the electron using cathode-anode voltage?

 

[manya]

can someone help me with this. i dont understand y the answer is not A

 

[Dream.Eater]

can someone help me with this. i dont understand y the answer is not A

Is the answer C?

 

[princess Anu]

when two waves are in phase their path difference has to be O? or can it be an integral multiple of wavelength?

 

[princess Anu]

what should be the effect and why?

 

[The Sarcastic Retard]

can someone help me with this. i dont understand y the answer is not A

You may have not checked the answer correctly, it has to be A. You are correct.

 

[The Sarcastic Retard]

when two waves are in phase their path difference has to be O? or can it be an integral multiple of wavelength?

Yes it is always zero when the waves are in phase.

 

[The Sarcastic Retard]

View attachment 51289 what should be the effect and why?

-suchal

 

[manya]

Is the answer C?

yes, it is C.

 

[manya]

You may have not checked the answer correctly, it has to be A. You are correct.

i wish but i checked again and it is still not the answer. it is question no. 5 of may june 2005.
here is the link
http://papers.xtremepapers.com/CIE/...and AS Level/Physics (9702)/9702_s05_qp_1.pdf
http://papers.xtremepapers.com/CIE/...and AS Level/Physics (9702)/9702_s05_ms_1.pdf

 

[princess Anu]

Yes it is always zero when the waves are in phase.

so the waves entering the double slit should be coherent( having constant phase diff example 2lamda) or in phase?( 0 phase difference )

 

[princess Anu]

is my displacement time graph for this situation okay?

 

[The Sarcastic Retard]

so the waves entering the double slit should be coherent( having constant phase diff example 2lamda) or in phase?( 0 phase difference )

Still not there in that chapter.

 

[The Sarcastic Retard]

i wish but i checked again and it is still not the answer. it is question no. 5 of may june 2005.
here is the link
http://papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Physics (9702)/9702_s05_qp_1.pdf
http://papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Physics (9702)/9702_s05_ms_1.pdf

ITS A!

 

[mynameisnotneeded]

Hey, I have a question regarding Paper 5.
So in question 1, where a method of data analysis is required to be mentioned, the most common one is the graph.
Now, I know that it is mandatory to mention the variables plotted in the graph. But are we allowed to use derived variables?

I'll explain with an example...
S14 - Paper 51
The equation provided is T^2 = constant x (C-R)
where C and R are variables. The question asks us to investigate the relationship between T and R, for which I decided to draw a graph with (C-R) in the X axis and T^2 in the Y axis.

However, the marking scheme states that a graph of T^2 against R should be drawn. The analysis provided is also according to this. My analysis is different, for my graph is different.

I was wondering if, since my answer is different, would I gain the same credit as the answer in the marking scheme? Or would I not?

 

[Dr Death]

I need very old past papers ( 1990 - 2000 ) . Any idea where to get them.
I hear they are very hard and I would like to try them as I have finished all past papers that came from 2000.
Another problem I face is that I never get above 30 for MCQ's (paper 1). I need at least 35. I have done all the papers and I still am unable to get anything above that. Any help
I am sitting for this time May/June session.