Physics: Post your doubts here!

[DeViL gURl B)]

thanks alot for an answer

But can you please elaborate on how to find the decreasing field strength part?

Thanks again

U're welcome
Now got it?

 

[UXm@N]

Suggest why a thin rod can bend more than a thick rod without breaking.
Explanation required.Thanks in advance.

 

[Suchal Riaz]

Why doesnt the power generated equal to I2R where R=.1+.5+3.4??

because not all of power is used up in resistors. when you are finding power of an e.m.f source it means "rate of how much electric energy is converted from other sources of energy" so there is nothing to do with resistors.
but when you are finding power of a resistor it means "rate of how much work is done by the resistor/ or how much electric energy is converted into other forms of energy"
in some cases it can give correct answer by using total R. in that case power generated by the e.m.f source=power used up by the circuits.
i must give you alot of example to make sure the concepts are cleared. maybe this one example will do the job for now

in this case the power in A = power dissipated by R

 

[Talha Irfan]

When will we need to describe this?

It is mentioned out there in the 2014 Physics AS Syllabus under the section 3(i)

 

[Lightning soul]

Yes, it can be either top or bottom.

No problem.

But that's just showing lower field strength. They're asking for a decreasing field strength. Wouldn't between the charged sphere and the plate make more sense as the sphere has the greater strength and the plate has the smaller strength so the center should show the strength decreasing?

 

[DeViL gURl B)]

Guys..
The conditions for the *young double slit experiment * and for the *interference pattern * are the same right.. Confused :$

And these are the conditions ..
-> monochromatic light
-> coherent sources
-> same frequency and amplitude
-> plane of polarization should be the same


Please add more .. If required and correct if any wrong
Thank u

Any one .. Please??

 

[Iridescent]

But that's just showing lower field strength. They're asking for a decreasing field strength. Wouldn't between the charged sphere and the plate make more sense as the sphere has the greater strength and the plate has the smaller strength so the center should show the strength decreasing?

But according to the b(ii) 1, center is the region showing constant field strength.
And when we are marking top or bottom, we show it towards the plane, right? So that covers both the lower and the decreasing part.

 

[umair1161]

Yes, it can be either top or bottom.

No problem.

Thanks a lot!

 

[umair1161]

U're welcome
Now got it?

Yeps!

Thanks alot!

 

[DeViL gURl B)]

Yeps!

Thanks alot!

No problem

 

[Iridescent]

Any one .. Please??

Young's double slit experiment shows interference. Therefore, the conditions are same.

 

[lescynicist]

people, please i need full electricity notes for AS. Help me out.

 

[lescynicist]

excellent AS waves notes for anybody who needs them.

 

[ZaqZainab]

people, please i need full electricity notes for AS. Help me out.

this is all i have

 

[DeViL gURl B)]

Young's double slit experiment shows interference. Therefore, the conditions are same.

Okhay thank u

 

[Browny]

Can someone tell me how much we must score for physics theory paper to score a A grade?

 

[Browny]

http://papers.xtremepapers.com/CIE/...and AS Level/Physics (9702)/9702_w07_qp_2.pdf

Can anyone please explain question 4)c) in detail with long explanation, please?

 

[umair1161]

http://papers.xtremepapers.com/CIE/...nd AS Level/Physics (9702)/9702_s10_qp_23.pdf

Question 3 (a) please!

Thanks in advance!

 

[Mayisha M]

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)

http://papers.xtremepapers.com/CIE/...nd AS Level/Physics (9702)/9702_w13_qp_21.pdf
Someone help me understand question 5 (a)(ii) where they ask you to find the amplitude?
I've solved like tonnes of papers and never saw sth like this -.-
Please help.
Also, if Im not being such a bother, explain 5(b) to me as well?
Thanks

 

[princeali97]

View attachment 41834

Wow good explanation.Thanks.