Search results

  1. N

    Cirucits and Signals

    1. Homework Statement I have difficulty in understanding the meaning of fundamental cutsets.I don't really know how to find the fundamental cutsets.Can someone please guide me.It would be the best if there are any examples and links cited for me.Thanks in advance.. 2. Homework Equations...
  2. N

    Design of an ac ammeter

    1. Homework Statement I was assigned to design an ac ammeter.But i have no idea how to work on it and don't know how to find the R for the ac ammeter? Thx for the help! =] 2. Homework Equations 3. The Attempt at a Solution
  3. N

    Three phase system

    1. Homework Statement consider the balanced three phase star source with RMS phase voltage magnitude of 230V shown in fig5 with an impedance of Zg=5+j5.The per-phase impedance value of a three phase balanced star and delta connected loads are 30+j30. a)Determine the line and phase voltages...
  4. N

    Forces between 2 parallel wires=>

    oh,i can figure it out already,thanks for your guidance o:)
  5. N

    Forces between 2 parallel wires=>

    1. Homework Statement four long straight parallel wires located at the corners of a square of side l=6cm carry equal current I=10A which is perpendicular.Determine the magnitude and direction of B at the center of the square. 2. Homework Equations don't have,so sorry.. 3. The Attempt...
  6. N

    Electrostatics - Compute the electric charge

    Re: Electrostatics.. ohh..ya,i wasn't realise about it..thanks for the hint,mentor..thanks alot..=>
  7. N

    Electrostatics - Compute the electric charge

    1. Homework Statement three point charges q1,q2&q3 are place at the vertices of triangle as shown in the diagram charge q1 has been given 4.5 X 10^13 extra electrons, charge q2 given 9.0 X10^13 extra electrons and q3 has had 9.0 X 10^13 electrons taken from it. Calculate the electric charge of...
  8. N

    Integration by parts

    hmm..rootx..do we have a special formula to factorize out for cubic equation?for example (x^3 + 27)????
  9. N

    Integration partial fractions

    ok,i understand..thanks a lot..
  10. N

    Integration by parts

    thanks greg ,i got you..
  11. N

    Integration by parts

    ok.thanks alot,i understand much better..
  12. N

    Integration partial fractions

    1. Homework Statement integrate (4x^2 + 3x + 6)/x^2 (x+2) dx 2. Homework Equations don't have sorry.. 3. The Attempt at a Solution firstly = A/x + B/x^2 + C /x+2 , = A(x^2)(x+2) + B(x)(x+2) + C(x)(x^2) equating with the 4x^2 + 3x + 6,then i integrate it,but my ans turn out to...
  13. N

    Integration by parts

    ok..no problem..thanks for guiding me all the way..
  14. N

    Integration by parts

    oh i see..i'm from foundation in engineering,next year going for electrical most probably..haha, that will be very good if you can be one of my mentor..haha,do you have a messenger account?i will try out those questions since its so challenging..thanks a lot anyway..:rofl:
  15. N

    Integration by parts

    oh..so you are from canada? haha..oh well,i will find out those books as you mentioned..which field are you in?engineering?
  16. N

    Integration by parts

    ok,thank you...where are you from?i'm using calculus university as my reference..
  17. N

    Integration by parts

    oh,ya sure i tried a lot of these kind of problems..and catching up well,do you have any link which leads to more ques with solutions?by the way thanks for your help,if not i won't be able to get these things solved..haha..
  18. N

    Integration by parts

    oh..ok..im still very weak in integration by parts..do you think of anything which could improve me on that topic?
  19. N

    Integration by parts

    i could integrate it thanks a lot,yesterday was brain dead..im so sorry,finally i get your points clear d..thanks man,integrate /x/(x+1) will be ln(x+1) i completely understand..thanks to both of you..but i put it in this way,can you please check out could this sol works? 1st,i use a=x+1 ,then...
  20. N

    Integration by parts

    ok,thanks a lot.,i get your idea..but i can't really take it from there but then i can get it by putting your idea into my way..anyway thank for your help
  21. N

    Integration by parts

    ya,the answer is not match then which part of mine turn out to be wrong?then integrate of 1/(x+1) wrong?why?so what should i do?no,que required to integrate by parts,which means /u dv = uv - /v du
  22. N

    Integration by parts

    ya that's integral sign,why do you say it's wrong?can you please tell me..?thanks..i did like what nomoreexams said..i still can't get my ans correct..i sow you my steps please rectify me.. like what he says; u=ln(x+1) after diff du/dx = 1/x+1 and u integrate dv=1 dx..it will be v= x so finally...
  23. N

    Integration by parts

    i did like what you mention but i couldn't find the ans..the ans is (x+1)(ln(x+1)) -(x+1) + c ,if i differetiate du/dx =1/(x+1) and sub into the formula i can't get..
  24. N

    Integration by parts

    1. Homework Statement integrate ln(x+1) dx (integrate by part) 2. Homework Equations integrate e^-2x sin3x dx 3. The Attempt at a Solution 1st,i make u=x+1 ,so du/dx =1 du=dx..while i use /dv =/ln(x+1) dx and after integrating my v=1/(x+1) so subtitute into uv -/vdu but my ans...
  25. N

    Quantum physics vs classical physics

    i got you..so in fact i just want to get some references to help me get a clearer picture of it....:blushing:
  26. N

    Quantum physics vs classical physics

    the chapter of quantum physics vs classical physics will be one of the topic that i will be tested in final exam,but i'm a little confused by them..so i need a good references to refer to..could you please recommend me some good website as i can refer to..i have found this...
  27. N

    Concave mirrors

    ah..i got your point..understood..thanks for your kind help..thanks!!!:smile:
  28. N

    Concave mirrors

    oh..did you actually mean that convention merely a choice for me..so,if i place a either a negative sign or i don't will also be correct???..then the problem the magnification should be -2 instead of 2?if yes then i understand completely...?
  29. N

    Concave mirrors

    1. Homework Statement An inverted image is magnified by 2 when the object is placed 22 cm in front of a concave mirror. Determine the image distance and the focal length of the mirror. 2. Homework Equations don't have,sorry 3. The Attempt at a Solution firstly,i use M= -di/do...
  30. N

    diffraction grating ques

    Re: diffraction grating ques.. ok,i got you,i use d=l/N ; l= 10^-2 , N =6000 thus, 10^-2/6000 so my d =1.67 X 10^-6 afterall i shall applied sin@=m X lambda / d .........CORRECT???
Top