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  1. H

    Physics: Post your doubts here!

    thank you brother for clearing my cnfusion
  2. H

    A2 Physics | Post your doubts here

    sea when the e.m.f is induced in the coil....a current will flow in that circuit....since thee is a coil with current in it ....it will produce a magnetic field that will oppose the motion of magnet according to lenz's law....so when R increased I DEcreased so opposing B decreased.....so as a...
  3. H

    A2 Physics | Post your doubts here

    brothe r for question 7 part B i got amore convincing explanation.....and THATS THE REAL EXPLANATION I think....see the current induced in coil will poroduce an opposing magnetic field which will produce the damping force...so when reistance increased ....current less so opposing magnetic field...
  4. H

    A2 Physics | Post your doubts here

    yea...i guess smone else shud answer it ...i m not confident on it ....i just knw how to name these examples.....
  5. H

    A2 Physics | Post your doubts here

    well as for the example of resonance...where is it useful...u can say in US ....and u knw from application part why we want resonance so as to get max amplitude of us waves....also in magnetic resonance imaging and NMR spectroscopy we use resonance....
  6. H

    A2 Physics | Post your doubts here

    yea question 7 b is important ....in shaping ur concept....this is how i resolved it see e.m.f induced in the coil has nothing to do with resistance ryt...its depndent on no.of coils or speed of movement or things like that......so e.m.f induced will remain as 'V'......now if resistance is...
  7. H

    A2 Physics | Post your doubts here

    yea u r ryt abt 3 d(I)
  8. H

    need help forA level bio paper 5 and if you got notes on it , it will be nice :)

    well cn u explain me that nail varnish method for stomatal density ....i dint get that +what is nail varnish(is it nail polish)
  9. H

    May/June 2012 - Biology Revision :)

    THERE IS ALREADY A BIOLOGY THREAD ...@XPF MEMBER U CN CHANGE IT TO AS AND CONVERT THIS ONE TO A2 ONLY THREAD
  10. H

    May/June 2012 - Biology Revision :)

    well...please make sole thread for A2.......
  11. H

    Physics: Post your doubts here!

    pls tell mo how u solve it
  12. H

    Mathematics: Post your doubts here!

    @XPFmember
  13. H

    Mathematics: Post your doubts here!

    thanks ...was a good question
  14. H

    Mathematics: Post your doubts here!

    is like (2x-3)^3 - 6x
  15. H

    Physics: Post your doubts here!

    in ADC .......why having more bits reduces step height how information is carried in an optic fiber.....ok its in the form of light....bt i can tvisualise how waht i ll speak can be carried by lkight,.....or how a football match broadcast cn be carried in the form of light
  16. H

    need help forA level bio paper 5 and if you got notes on it , it will be nice :)

    in plan of biology there are some things u can always write ....like repeat each experiment at least three times and obtain mean value.....or to remove anomalies....secondly repeating experiment is concerned with reliability not with accuracy....accuracy will be improved by using sophisticated...
  17. H

    need help forA level bio paper 5 and if you got notes on it , it will be nice :)

    well one thing....when calibrating an eyepiece graticule.....if i am viewing using 10x lens then calibration shud be made using this magnification....if u are measuring specimen at 40x then calibration must be done at 40x....
  18. H

    Mathematics: Post your doubts here!

    yea brother ....i understood that method of diagram...yea its hell easier....well i have one question from p3 book.... cn u help me on that.....(btw i hav done the past papers ;they are quite easy so thought of doing some p3 questions) if arg(1/3 - z)=pi/6 then what is arg(3z-1)
  19. H

    Mathematics: Post your doubts here!

    brother the picture u posted.....cn u solve that question in this way...i guess there's a problem in this way on that question
  20. H

    Chemistry: Post your doubts here!

    well here u ll have to tell why a metal is malleable but an ionic compound is not..... metals malleability is due to the fact that atoms are arranged in layers surrunded by sea of elecctrons acting as glue....so since these layerrs can slide past easily we cn give metal different shapes....bt i...
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