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  1. 1

    Physics: Post your doubts here!

    I have a doubt in this isnt your explanation valid if electron behave like wave but here we are talking abut photo electric effect
  2. 1

    Physics: Post your doubts here!

    thanks alot I totally got understood it but the problem that is arising is that if you say that intensity is the total energy carried by the photon then it means if you increase the intensity you can make photo electron emission possible without reaching the thresohold frequency
  3. 1

    Physics: Post your doubts here!

    thanks alot for your reply iam a bit still confused like isnt intersity the no. of photons travelling? so if thet are constant wouldn't the current remain constant?
  4. 1

    Physics: Post your doubts here!

    can some one please help with this pleaseee:( http://papers.xtremepapers.com/CIE/Cambridge%20International%20A%20and%20AS%20Level/Physics%20(9702)/9702_s11_qp_41.pdf 7c(ii)
  5. 1

    Physics: Post your doubts here!

    Assalamoalikum wr wb Can anyone please tell me the advantages of Radio waves over other methods of communication? Jazak Allah khairn.
  6. 1

    the apparatus is listed in ms or er so if you dont have idea how to draw it you can look them...

    the apparatus is listed in ms or er so if you dont have idea how to draw it you can look them down on google image
  7. 1

    The best thing is While doing the paper-5 -Open up Marking scheme and Examiner report -first...

    The best thing is While doing the paper-5 -Open up Marking scheme and Examiner report -first create a picture in your mind of the experiment and then look up i the marking scheme and examiner report add those with your own point do these for the first 5-6 of your papers late youll get used...
  8. 1

    and Walikummasalam

    and Walikummasalam
  9. 1

    actually i havent solved much of physics paper-5,s although i have solved lots of chemistry...

    actually i havent solved much of physics paper-5,s although i have solved lots of chemistry paper-5,s ill be solving physics paper5,s next week InshaAllah will try to post its question by next week if i get time
  10. 1

    Physics: Post your doubts here!

    i have doubt in this question i have drawn the graph below and i think thiere is some mistake in this can some one please check and if theres a mistake rectify it please http://papers.xtremepapers.com/CIE/Cambridge%20International%20A%20and%20AS%20Level/Physics%20(9702)/9702_w07_qp_4.pdf...
  11. 1

    Physics: Post your doubts here!

    obviously A -the vertical component of 20 is 20cos(theata) and its horizontal component is 20sin(theata) -hence F=20sin(theata) and 15=20cos(theata) IF the system is in equilibrium
  12. 1

    Physics: Post your doubts here!

    I have posted the solution of this question before as well see first off all when the lift moves 1mm down each of the steel cable expand with an extention of 1mm. -the downward force by man is (80)(9.81)=784.8N -this is the sum of the force applied to those 2 steel cables - as both have the same...
  13. 1

    Physics: Post your doubts here!

    Assalamoalikum Wr Wb http://papers.xtremepapers.com/CIE/Cambridge%20International%20A%20and%20AS%20Level/Physics%20(9702)/9702_w09_qp_42.pdf number-12c(i) please dra graph for it thanks and Jazak Allah Khairn
  14. 1

    Physics: Post your doubts here!

    can someone please help http://papers.xtremepapers.com/CIE/...nd AS Level/Physics (9702)/9702_s11_qp_41.pdf 6b(ii) please explain this iam totally stuck at this. Jazak Allah khair
  15. 1

    Physics: Post your doubts here!

    see first off all when the lift moves 1mm down each of the steel cable expand with an extention of 1mm. -the downward force by man is (80)(9.81)=784.8N -this is the sum of the force applied to those 2 steel cables - as both have the same dimention they will experience the same force - 2f=784.8...
  16. 1

    Physics: Post your doubts here!

    (y) thanks a lot bro, Jazak Allah khairn
  17. 1

    anyone applying to NUST ?

    Engineering. Chemistry, physics and Mathematics in Alevel
  18. 1

    anyone applying to NUST ?

    your applying for NET-1? I Will apply for NET-2 InshaAllah
  19. 1

    Physics: Post your doubts here!

    Can anyone please help me in http://papers.xtremepapers.com/CIE/Cambridge%20International%20A%20and%20AS%20Level/Physics%20(9702)/9702_s03_qp_1.pdf number-5
  20. 1

    Application Booklet Notes for Physics and Chemistry

    Btw all credits to captain danger and dayyanah
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