Physics: Post your doubts here!

[naoomi]

alrigh

For question 12
Bodies do NOT stick together after an elastic collision, they will bounce off each other
Only in inelastic collision they will stick

Alrightt! thank youu! please see to my other questions as well whenever you can.

 

[WYuMon]

Sorry I am busy getting ready for A2
I will be free to answer any question after 19th Nov

 

[swissmaid]

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)

the compiled topical questions for Paper 2 and Paper 4 cant be downloaded............

 

[moinul]

can anyone plz help me telling how to draw error bar in p5? if possible plz post a snapshot with graph.

 

[demon29]

Q2 part (d) and (e) a lil help please

http://papers.xtremepapers.com/CIE/...nd AS Level/Physics (9702)/9702_s12_qp_52.pdf

 

[naoomi]

Sorry I am busy getting ready for A2
I will be free to answer any question after 19th Nov

Okay no problem. Answer them after 19th Nov!

 

[saad10khan]

how to find the gradient and y-intercept in P5 phy. oct/nov 2011(52) Q2 part1 t^2=kr^3. whats the y-intercept and gradient. help needed also the how to find the errors in the next part

 

[M.Saud Lakhany]

Write them a hundred times you will definitely remeber

 

[M.Saud Lakhany]

Guys from where to study for p1??

 

[TheStallion-Reborn]

can someone provide the notes that may help me understand the chapter "units" in a better way?

 

[demon29]

how to find values of "v" in q2 part (b) http://papers.xtremepapers.com/CIE/...nd AS Level/Physics (9702)/9702_w11_qp_53.pdf

 

[miss.insomniac]

How do i plot for the error bars? Anyone?

 

[Jinosupreme]

The order of magnitude of the frequency of the longest-wavelength ultraviolet waves can be
expressed as 10^x Hz.
What is the value of x?
A 13
B 15
C 17
D 19

Answer is B, why?

 

[Jinosupreme]

A small charge q is placed in the electric field of a large charge Q.
Both charges experience a force F.
What is the electric field strength of the charge Q at the position of the charge q?

A) F/(Qq)

B) F/Q

C) FqQ

D) F/q

Answer is D, why isn't B? :O HELP

 

[Jinosupreme]

http://papers.xtremepapers.com/CIE/...nd AS Level/Physics (9702)/9702_s10_qp_11.pdf
Guys, need help! :O

Q 16, 27, 34, 36

Answer is
16 D
27 A
34 A
36 D

Pls help THANKS!

 

[snowbrood]

The order of magnitude of the frequency of the longest-wavelength ultraviolet waves can be
expressed as 10^x Hz.
What is the value of x?
A 13
B 15
C 17
D 19

Answer is B, why?

ultraviolet's wavelength lies in (4*10^-7) to 10^-8 longest wavelength is 10^-7. speed of all electromagnetic waves is 3*10^8 V=f*lamda.
lamda is wavelength
f is frequency of wave
v is speed
f=v/lamda=10^8/10^-7 .
do the maths u will add the powers it adds to 15 B is the answer

 

[snowbrood]

A small charge q is placed in the electric field of a large charge Q.
Both charges experience a force F.
What is the electric field strength of the charge Q at the position of the charge q?

A) F/(Qq)

B) F/Q

C) FqQ

D) F/q

Answer is D, why isn't B? :O HELP

greater the charge the more the electric field. since both Experiences a same force F it should be F/q. or u could say like F=E*charge now since F is constant if u increase the electric field strength u decrease the charge

 

[Anallia]

http://papers.xtremepapers.com/CIE/...nd AS Level/Physics (9702)/9702_s10_qp_11.pdf
Guys, need help! :O

Q 16, 27, 34, 36

Answer is
16 D
27 A
34 A
36 D

Pls help THANKS!

for 16 efficiency= energy output/energy input ie work done by car/driving force giving us D as the answer
27 in an electric field when two points are at 90 degrees to each other, no work is done therefore the energy is 0 which is A
34 from kirchoff's second law (the sum of emfs=sum of pds) E=V1+V2 we get IR=IR1+IR2 and since current is the same throughout the circuit the law used is the conservation of charge which is A
for 36 i'm not really sure as well

 

[Jacob Park]

Physics Help plz

A car travelling with speed 28 m s–1 leaves a motorway on an exit road. The end of the exit road is
22 m higher than the motorway.
If only the force of gravity is considered, what will be the speed of the car at the end of the exit
road?
A 7.3 m s–1 B 19 m s–1 C 21 m s–1 D 24 m s–1

 

[WYuMon]

What's the answer? Is it 19ms?
I thnk there is missing information