Physics: Post your doubts here!

[gary221]

may/june 12 paper 42 Q5 (b) (i)
http://papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Physics (9702)/9702_s12_qp_42.pdf

^please help with this

since the reading on the balance increases => there is a downwards force acting on the magnet/balance.
So, according to Newton's 3rd law (action-reaction law), the force on the wire must be in the opp direction ie upwards.

 

[elwad yousef]

h

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)[/q
hello can you post AS level not A level notes?

 

[elwad yousef]

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)

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)

hello can you please post AS level not A level notes because i get confused

 

[Adorkableme]

could someone plz explain how I am suppose to solve this Qs or Qs like this....Its question 13


http://papers.xtremepapers.com/CIE/...nd AS Level/Physics (9702)/9702_w10_qp_11.pdf

 

[megamind]

i need physic telecomunication help​

what is the function of
DAC​

serial to parallel converter​

and af amplifier​

​

 

[megamind]

can any one help me please i am at the point of death​

 

[gary221]

i need physic telecomunication help​

what is the function of​

DAC​

serial to parallel converter​

and af amplifier​

​

DAC = produces an analogue signal from the sampled binary digits.
serial to parallel = the same.
a.f. amplifier = amplifies the analogue signal n passes it to the ADC.

 

[Haider2011]

https://www.xtremepapers.com/commun...mistry-with-marking-scheme.24463/#post-485123

 

[cyclone94]

salamz
sm1 plz help wid dis
state wat is meant by a tesla..........it comes for 3 mks............
i only noe 1 point ie. it is d SI unit of magnetic flux density.......wt more points r der for dis...???

 

[xxfarhaxx]

salamz
sm1 plz help wid dis
state wat is meant by a tesla..........it comes for 3 mks............
i only noe 1 point ie. it is d SI unit of magnetic flux density.......wt more points r der for dis...???

1 tesla is the uniform magnetic flux density, which actiing normally to a long straight wire of length 1m carrying a current of 1A, acting perpendicular to the magnetic field, producing a force of 1N on the conductor...

u jst hav to define the equation B=F/Il

 

[cyclone94]

1 tesla is the uniform magnetic flux density, which actiing normally to a long straight wire of length 1m carrying a current of 1A, acting perpendicular to the magnetic field, producing a force of 1N on the conductor...

u jst hav to define the equation B=F/Il

Jazakallah

 

[1357913579]

DAC = produces an analogue signal from the sampled binary digits.
serial to parallel = the same.
a.f. amplifier = amplifies the analogue signal n passes it to the ADC.

Assalamoalikum wr wb

Can anyone please tell me the advantages of Radio waves over other methods of communication?
Jazak Allah khairn.

 

[Tkp]

oct nov 11 qp 23-2cii

 

[gary221]

Assalamoalikum wr wb

Can anyone please tell me the advantages of Radio waves over other methods of communication?
Jazak Allah khairn.

Radio waves(high frequency):
i) have high bandwidth n can carry a large amnt of info.
ii) can be transmitted as narrow beams which r more secure.
iii) r line-of-sight n often use a satellite.

 

[Adorkableme]

Can someone please help me with question 13.........

http://papers.xtremepapers.com/CIE/...nd AS Level/Physics (9702)/9702_w10_qp_11.pdf

 

[gary221]

Can someone please help me with question 13.........

http://papers.xtremepapers.com/CIE/...nd AS Level/Physics (9702)/9702_w10_qp_11.pdf

Moment of force = force * perpendicular distance from pivot
1) So, force = 10 N, dist from pivot = 2 m. So, moment = 10 * 2 = 20 Nm in 1 direction.
2) Force = 5 N, dist from pivot = (4-2) = 2m. So, moment = 5*2 = 10 Nm in same direction.
So, total moment = 10 + 20 = 30 Nm.

3) force = 15 N, dist from pivot = 3 m. So, moment = 15 * 3 = 45 Nm in the opp direction.

Thus, total moment = 45 - 30 = 15 Nm
So, ans = A

 

[goodluckayesha]

I got to know the apparatus for practicals 31 but no idea wht cud the experiment be

 

[mutilated_grass]

http://papers.xtremepapers.com/CIE/...nd AS Level/Physics (9702)/9702_w12_qp_12.pdf

Hey guys

It's question 10 from oct/nov 2012 paper 12

Regarding the projectile motion graph, why can't it be a straight line as shown by B? Assuming there is no air resistance, the horizontal velocity has no acceleration and the vertical component has constant acceleration; therefore the graph should have straight lines instead of a curve....the answer is D and I'm not sure why.

 

[daredevil]

May 2011 p11 Q9 Q10 Q13
May 2011 p12 q17 2 34 37 15 10 19 32
Please solve these questions for me and explain too

 

[haha101]

wha

http://papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Physics (9702)/9702_w12_qp_12.pdf

Hey guys

It's question 10 from oct/nov 2012 paper 12

Regarding the projectile motion graph, why can't it be a straight line as shown by B? Assuming there is no air resistance, the horizontal velocity has no acceleration and the vertical component has constant acceleration; therefore the graph should have straight lines instead of a curve....the answer is D and I'm not sure why.

whats the answer ?