Biology; Chemistry; Physics: Post your doubts here!

[a.abid]

which diameter are they asking??

lo g...read the question again..

 

[A star]

It would not fit the screen !! 15 hz need ten times more divisons on screen

10mm/div

 

[kitecrystal]

It would not fit the screen !! 15 hz need ten times more divisons on screen

what about last part of Q3?

 

[kitecrystal]

10mm/div

how did you find that?

 

[A star]

how did you find that?

first tell me am i rite

 

[kitecrystal]

first tell me am i rite

yes u r right

 

[Sara_Hassan]

first tell me am i rite

ure ryt!

 

[Sara_Hassan]

ure ryt!

but hwd u find dat?

 

[A star]

how did you find that?

well T=1/F it gives 0.067 so to convert it into milimetre multiply by thousand u will get 66.7 or 67 suiyable for last scale 1omm/div

 

[A star]

but hwd u find dat?

hope it clears it for u

 

[kitecrystal]

well T=1/F it gives 0.067 so to convert it into milimetre multiply by thousand u will get 66.7 or 67 suiyable for last scale 1omm/div

thanks but how it is suitable for 10ms setting?i did not get that........

 

[A star]

for others it goes of the screen

 

[kitecrystal]

well T=1/F it gives 0.067 so to convert it into milimetre multiply by thousand u will get 66.7 or 67 suiyable for last scale 1omm/div

could you plz explain futher after we get time period 67ms,how we know what is the suitable scale?

 

[MustafaMotani]

yar do u remember the options?

No ..

 

[kitecrystal]

anyone plz give the solution of Q3(c)(ii)...​

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[MustafaMotani]

thanks but how it is suitable for 10ms setting?i did not get that........

its simple if its , first know that there are altogether 10 horizontal divisions. OK
then if u keep 2ms (milli second) then total lenth will be 2 x 10 20 ms.
If 15 Hz in 20 ms this much wave will come (15 x 20 x10^-3) that comes 0.3 waves
when set to 5ms then (15 x 50 x 10^-3) that comes 0.75 waves
when 10ms (15 x 100 x106-3) that comes 1.5 waves
so 10 ms gives one complete wave

Hope I made myself clear ..

 

[MustafaMotani]

yar do u remember the options?

I think it was C

 

[xxvvyy]

http://www.xtremepapers.com/papers/CIE/Cambridge%20International%20O%20Level/Physics%20(5054)/5054_w04_qp_4.pdf

question number 4 c?

 

[amna shah]

http://www.xtremepapers.com/papers/...nal O Level/Physics (5054)/5054_w10_qp_41.pdf

can any explain 4 (B) .. how we have to draw it ?

 

[MustafaMotani]

http://www.xtremepapers.com/papers/...onal O Level/Physics (5054)/5054_w04_qp_4.pdf

question number 4 c?

it should be 25 cm far from object on refracted ray