Physics: Post your doubts here!

[WYuMon]

please someone help me with these 2 questions...... why is 6c?? in May/june 2008 Paper 1
http://papers.xtremepapers.com/CIE/...and AS Level/Physics (9702)/9702_s08_qp_1.pdf
http://papers.xtremepapers.com/CIE/...and AS Level/Physics (9702)/9702_s08_ms_1.pdf

and why is 8d and not c??? in May/June 2012 Paper 1
http://papers.xtremepapers.com/CIE/...nd AS Level/Physics (9702)/9702_s12_qp_12.pdf
http://papers.xtremepapers.com/CIE/...nd AS Level/Physics (9702)/9702_s12_ms_12.pdf
I hope we all do well in our exams this year ....InshAllah
Please reply asap!!!

Ok your 1st question
Acceleration is a vector which has magnitude and DIRECTION
Think of a Car driving round a roundabout
The direction of the car is changing constantly round the roundabout. Therefore it is accelerating even though Velocity remain unchanged/constant when the car is round the roundabout
You can say an object is accelerating if the direction is cjanging and velocity remain constant or vise versa AND or both is changing

 

[naoomi]

Can anyone please answer these questions from the paper june 2012/ variant 13

ques 5 (why isn't B correct)
ques 12(why isn't A correct? coz for elastic collision the bodies stick together after impact)
ques 19
ques 24
ques 31
ques 35
ques 38

 

[WYuMon]

For question 5
Because inverse graph will never ever touch the axis
And the question says I varies inversely to square of d
I answer the rest later

 

[6Astarstudent]

Anyone help me withJune2012 paper 42 Question 5.C

its an AC current with 5.6A RMS current.
we know that a DC current of 5.6A causes 2.4g increase on the balance
to find the maximum AC current we multiply 5.6 x root 2
and the force (or mass) caused is proportional to the current (F = BIL) so the maximum mass will be 2.4 x root 2 = 3.4g
and AC fluctuates from minimum back to maximum so varies from -3.4 -> 3.4g

 

[WYuMon]

its an AC current with 5.6A RMS current.
we know that a DC current of 5.6A causes 2.4g increase on the balance
to find the maximum AC current we multiply 5.6 x root 2
and the force (or mass) caused is proportional to the current (F = BIL) so the maximum mass will be 2.4 x root 2 = 3.4g
and AC fluctuates from minimum back to maximum so varies from -3.4 -> 3.4g

Thanks! My friend explained to me already, no one bother replyy question for almost 2days

 

[WYuMon]

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

 

[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