Physics: Post your doubts here!

[Someone2]

can someone give a model answer for this question?? the marking svheme doesnt make sense...
Explain why values of gravitational potential are always negative whereas values of
electric potential may be positive or negative.

 

[Hassan Ali Abid]

can someone give a model answer for this question?? the marking svheme doesnt make sense...
Explain why values of gravitational potential are always negative whereas values of
electric potential may be positive or negative.

due attration and repulsion the electric potential values are +ve and -ve where as in gravitational potential there's always attraction so everytime the -ve sign is included.

 

[TheStallion-Reborn]

any clue why are the 2013 physics a levels exam papers not available on xtreme papers?

 

[Hazel SD]

Explaination for this question plz

 

[Igcse stuff]

Can someone help me with this question....how do you calculate the resultant force?

 

[Igcse stuff]

Hey guys, can someone help me with notes on forces....

 

[ZaqZainab]

Can someone help me with this question....how do you calculate the resultant force?

Your doubt
and i don't exactly have forces notes but i did have trouble in forces this helped

 

[ZaqZainab]

Hey guys, can someone help me with notes on forces....

 

[1357911]

Explaination for this question plzView attachment 36310

Link to this question please?

 

[1357911]

any clue why are the 2013 physics a levels exam papers not available on xtreme papers?

http://maxpapers.com/category/qualifications/international/cambridge/a-level/a-level-physics-9702/

 

[Igcse stuff]

Your doubt
and i don't exactly have forces notes but i did have trouble in forces this helped

Thanks alot!!!!

 

[Igcse stuff]

Hey guys, what are you supposed to do in order to finish physics P1 P2 P4 and P5 without running out of time, and also getting A* overall?

 

[Hassan Ali Abid]

Hey guys, can someone help me with notes on forces....

Consult Pacific book 1,
Or any mechanics book cz if it will definitely let you to have stronger hand on forces and work,energy power etc ..
or see the vids of DRPHY on youtube ..

 

[Hassan Ali Abid]

Hey guys, what are you supposed to do in order to finish physics P1 P2 P4 and P5 without running out of time, and also getting A* overall?

Just focus on P4 as it is having the max weightage and try to score maxx marks ..like around 80-85 in this paper and you can easily get an A* or if you are having less time then you can only prepare the application part well along with other two topics like magnetism and quantum or heat ch ...and then give you max on P2 so this will easily let you to score atleast an A.
For paper 5 , you only have to memories the mark schemes or 3-4 specific papers and copy pasting that things in any paper can make an A in that component too ..

 

[RoOkaYya G]

someone help me with rms value problem solvings...

if theres notes on it or anythng plz send me the links...

thnk u

 

[Hassan Ali Abid]

someone help me with rms value problem solvings...

if theres notes on it or anythng plz send me the links...

thnk u

from sinusoidal wave u have to multiply the peak voltage with underroot 2 to get the value of either Ir.m.s or Vr.m.s.

 

[RoOkaYya G]

from sinusoidal wave u have to multiply the peak voltage with underroot 2 to get the value of either Ir.m.s or Vr.m.s.

yea i knw tht...but the thng is tht it gets complicated in word problems..

 

[Hassan Ali Abid]

yea i knw tht...but the thng is tht it gets complicated in word problems..

calculating the Irms from sinusoidal wave graph is different from square wave graph thats why u must be having the problems...
there's another way to calculate the Irms for square wave which is not given in the coursebook so first understand that method and then try to solve the questions.

 

[RoOkaYya G]

actually is nothin to do with a graph....its like a situation is given....weve to use rms...

ill upload a sample then help me with it,can u?

calculating the Irms from sinusoidal wave graph is different from square wave graph thats why u must be having the problems...
there's another way to calculate the Irms for square wave which is not given in the coursebook so first understand that method and then try to solve the questions.

 

[Eye catcher]

http://papers.xtremepapers.com/CIE/...nd AS Level/Physics (9702)/9702_s10_qp_22.pdf
q2-b,c Please fast