« previous next »
Pages: 1 ... 13 14 [15] 16   Go Down

Author Topic: IGCSE PHYSICS  (Read 23764 times)

Offline wassup

  • SF Citizen
  • ***
  • Posts: 259
  • Reputation: 384
  • Gender: Male
Re: IGCSE PHYSICS
« Reply #210 on: November 08, 2009, 02:21:18 pm »
Logged

nid404

  • Guest
Re: IGCSE PHYSICS
« Reply #211 on: November 08, 2009, 02:21:30 pm »
Quote from: astarmathsandphysics on November 08, 2009, 02:18:51 pm
I just spotted I passed 6000 posts.

congrats ;D
Logged

Offline ~~~~shreyapril~~~~

  • SF Master
  • ******
  • Posts: 2606
  • Reputation: 2640
  • Gender: Male
  • "Prototype"
Re: IGCSE PHYSICS
« Reply #212 on: November 08, 2009, 02:22:36 pm »
9)ai) power=VI=24*2=48W!!

ii) power1=power2 so 48=0.4x!!
solve for x x=120 volts!!

b)i) the transformer being 100% efficient means that power in primary is eaul to power in secondary!! it converts all the elcerticity withouht ne or less wastage!!
ms:no/very little energy/power lost or energy/power in =
energy/power out
ii)ms:any mention of magnetic field
changing magnetic field
field passes through core or secondary coil
induces voltage in secondary coil
number of turns on secondary determines voltage
output
Logged
Friendship is like peeing on yourself. Everyone can see it but only you get the warm feeling that it gives :D :P :)

Offline ~~~~shreyapril~~~~

  • SF Master
  • ******
  • Posts: 2606
  • Reputation: 2640
  • Gender: Male
  • "Prototype"
Re: IGCSE PHYSICS
« Reply #213 on: November 08, 2009, 02:25:15 pm »
Quote from: wassup on November 08, 2009, 02:12:43 pm
mj02 q9a
connect the 1 volt supply to Y's of CRO then measure the readings!!
the maximum value is 1!!
acc. mark the sacle!!
Logged
Friendship is like peeing on yourself. Everyone can see it but only you get the warm feeling that it gives :D :P :)

Offline wassup

  • SF Citizen
  • ***
  • Posts: 259
  • Reputation: 384
  • Gender: Male
Re: IGCSE PHYSICS
« Reply #214 on: November 08, 2009, 02:27:46 pm »
Quote from: ~~~~shreycool~~~~ on November 08, 2009, 02:22:36 pm
9)ai) power=VI=24*2=48W!!

ii) power1=power2 so 48=0.4x!!
solve for x x=120 volts!!

b)i) the transformer being 100% efficient means that power in primary is eaul to power in secondary!! it converts all the elcerticity withouht ne or less wastage!!
ms:no/very little energy/power lost or energy/power in =
energy/power out
ii)ms:any mention of magnetic field
changing magnetic field
field passes through core or secondary coil
induces voltage in secondary coil
number of turns on secondary determines voltage
output

sorry fr this but i wnted 2 know d ans fr 6th question of mj03.
Logged

Offline ~~~~shreyapril~~~~

  • SF Master
  • ******
  • Posts: 2606
  • Reputation: 2640
  • Gender: Male
  • "Prototype"
Re: IGCSE PHYSICS
« Reply #215 on: November 08, 2009, 02:28:32 pm »
np i'll do it and tell ya within short time!!
Logged
Friendship is like peeing on yourself. Everyone can see it but only you get the warm feeling that it gives :D :P :)

Offline moon

  • SF Citizen
  • ***
  • Posts: 222
  • Reputation: 770
Re: IGCSE PHYSICS
« Reply #216 on: November 08, 2009, 02:34:11 pm »
Quote from: ~~~~shreycool~~~~ on November 08, 2009, 01:52:08 pm
june 2001 Q8>>>

At last found the correct answer!!!!! Thanx 4 answering. :) :) :) :)
Logged

Offline wassup

  • SF Citizen
  • ***
  • Posts: 259
  • Reputation: 384
  • Gender: Male
Re: IGCSE PHYSICS
« Reply #217 on: November 08, 2009, 02:35:01 pm »
Quote from: ~~~~shreycool~~~~ on November 08, 2009, 02:28:32 pm
np i'll do it and tell ya within short time!!

thanks but can u explain d mj02 q9 properly plzzzzzzzz???
Logged

Offline ~~~~shreyapril~~~~

  • SF Master
  • ******
  • Posts: 2606
  • Reputation: 2640
  • Gender: Male
  • "Prototype"
Re: IGCSE PHYSICS
« Reply #218 on: November 08, 2009, 02:37:39 pm »
here it is!!
i have tried to to it!!
hope you get it!!
Logged
Friendship is like peeing on yourself. Everyone can see it but only you get the warm feeling that it gives :D :P :)

Offline wassup

  • SF Citizen
  • ***
  • Posts: 259
  • Reputation: 384
  • Gender: Male
Re: IGCSE PHYSICS
« Reply #219 on: November 08, 2009, 02:44:24 pm »
thanks shrey nd can u explain mj02 q9 properly n check d ans for mj03 q4b ??? ???
Logged

Offline astarmathsandphysics

  • SF Overlord
  • *********
  • Posts: 11271
  • Reputation: 65534
  • Gender: Male
  • Free the exam papers!
Re: IGCSE PHYSICS
« Reply #220 on: November 08, 2009, 02:49:54 pm »
which paper?
Logged

Offline ~~~~shreyapril~~~~

  • SF Master
  • ******
  • Posts: 2606
  • Reputation: 2640
  • Gender: Male
  • "Prototype"
Re: IGCSE PHYSICS
« Reply #221 on: November 08, 2009, 02:50:18 pm »
y wats it??
i guess it is better if you do this for 4b

volume*pressure=k!!

so 2*105*80=k
so now new volume =k/25
= 2*105*80/25
=6.4*105

hope ya get it!!
Logged
Friendship is like peeing on yourself. Everyone can see it but only you get the warm feeling that it gives :D :P :)

Offline ~~~~shreyapril~~~~

  • SF Master
  • ******
  • Posts: 2606
  • Reputation: 2640
  • Gender: Male
  • "Prototype"
Re: IGCSE PHYSICS
« Reply #222 on: November 08, 2009, 02:51:41 pm »
Quote from: wassup on November 08, 2009, 02:35:01 pm
thanks but can u explain d mj02 q9 properly plzzzzzzzz???
just put the connections in y input!!
dc gives you the max value that is 1V
mark the max value as 1V and then half as 0.5!!

and so on!!
Logged
Friendship is like peeing on yourself. Everyone can see it but only you get the warm feeling that it gives :D :P :)

Offline wassup

  • SF Citizen
  • ***
  • Posts: 259
  • Reputation: 384
  • Gender: Male
Re: IGCSE PHYSICS
« Reply #223 on: November 08, 2009, 02:52:34 pm »
Quote from: ~~~~shreycool~~~~ on November 08, 2009, 02:50:18 pm
y wats it??
i guess it is better if you do this for 4b

volume*pressure=k!!

so 2*105*80=k
so now new volume =k/25
= 2*105*80/25
=6.4*105

hope ya get it!!

i did this only but the ans in d ms is 64  ??? ??? ???

i know how 2 do it. just wanted 2 know how is it 64 or is d ms wrong again?
Logged

Offline ~~~~shreyapril~~~~

  • SF Master
  • ******
  • Posts: 2606
  • Reputation: 2640
  • Gender: Male
  • "Prototype"
Re: IGCSE PHYSICS
« Reply #224 on: November 08, 2009, 02:56:21 pm »
direct form ms!!
no editing:
(b) any attempt to use p x v = constant or correct
proportion
fraction 2 x 80/25 seen
p = 6.4 x 10 (Pa)
Logged
Friendship is like peeing on yourself. Everyone can see it but only you get the warm feeling that it gives :D :P :)
Pages: 1 ... 13 14 [15] 16   Go Up
« previous next »