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  1. H

    A2 Physics | Post your doubts here

    functions of cellular exchange: permits entry to PSTN selects base station for any handset allocates a carrier frequency/channel monitors handset signal to re-allocate base station allocates time slot for multiplexing now cn anyone xplain first and last point.....and also tell what...
  2. H

    Mathematics: Post your doubts here!

    yea absolutely correct
  3. H

    A2 Physics | Post your doubts here

    well u mean the meaning of cutting with flux applies to moving wire.....hmm.....ithought if a wire is stationary its still cutting flux.....bt now i understand cutting through means it shud be mooving
  4. H

    A2 Physics | Post your doubts here

    the question further says when wie is plucked and starts vibrating an alternating voltage trace is observed on cro......question asks why e.m.f is induced ms says the wire cuts magnetic flux.em.f is induced when there is cutting of flux.......now the problem is with the vagueness of this ms.cos...
  5. H

    A2 Physics | Post your doubts here

    well http://www.xtremepapers.com/papers/CIE/Cambridge International A and AS Level/Physics (9702)/9702_w02_qp_4.pdf q1 part b .....is it OVERESTIMATE? USING LENZ'S LAW, explain why input p.d is out of phase wid output p.d in transformer
  6. H

    A2 Physics | Post your doubts here

    i dint understand how u did it...plz explain
  7. H

    A2 Physics | Post your doubts here

    wat abt carrier wave frequency.....info signal frequency is correct
  8. H

    A2 Physics | Post your doubts here

    tell frequency of info signal and unmodulated carrier wave
  9. H

    A2 Physics | Post your doubts here

    well o/n 04 telecommunication....chek this ppr must,.....quite tricky questions
  10. H

    A2 Physics | Post your doubts here

    WELL this question suggest we must memorise that table in booklet
  11. H

    A2 Physics | Post your doubts here

    to prevent multipath dispersion......thats just comes from the fact that a light beam has many rays and each ray will have to travel different distance
  12. H

    A2 Physics | Post your doubts here

    well Explain why the circular motion of the conical pendulum has the same frequency as the simple pendulum.
  13. H

    A2 Physics | Post your doubts here

    practice
  14. H

    A2 Physics | Post your doubts here

    anyone???? State what is meant by the photoelectric effect?
  15. H

    A2 Physics | Post your doubts here

    for p to q its simple p times delta v. for last part make use of the fact that total change in internal energy is ZERO.cos u end up at the same p v values from where u started.....alternatively u cud make use of the formula 3/2 pv (i.e internal energy of ideal gas)
  16. H

    A2 Physics | Post your doubts here

    well see F=BIL......since B and L have not changed F is proportional to I.and F=mg......so m is proprtional to I since g is a constant.now the tricky part alternating current means it ll be changing direction so in one half reading will increase while for the other half it will...
  17. H

    A2 Physics | Post your doubts here

    the problem is that all values are NOT integral multiples exactly !!!
  18. H

    A2 Physics | Post your doubts here

  19. H

    A2 Physics | Post your doubts here

    please tell how to show anser for 1st question part b
  20. H

    A2 Physics | Post your doubts here

    no thats faulty...brother.........see the question say 0010 at START so u shud have started from 2 at 0 ms
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