Qualification > Sciences
ALL PHYSICS DOUBTS - POST HERE !!
Dana:
--- Quote from: pglasg74 on May 26, 2010, 11:43:33 am ---can someone answer http://www.freeexampapers.us/IGCSE/Physics/CIE/2008%20Jun/0625_s08_qp_3.pdf
NUMBER 8 A THAAANKS AND PHYSICS PAPER 1 WAS AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAMAZING LOTSA TRICKS THO
--- End quote ---
Ahhh I hope ours is just as good! Congrats By the way :)
for a you draw them all in parallel and you put a switch near the battery. then 3 others on each line where the lamps are.
for b) P=IV so I= P/V so 100/200 is 0.5 A. I might be wrong though check and tell me
for b)ii) I(current)= Q(charge in coulombs)/t(time in secs) 1 min=60 secs.
Q=I x t so 0.5A x 60 is 30C
for c)i) you add the total power of the first 3 lamps minus the total power of the second three lamps
ii) you take the value that you got for for the reduction in power (c)i)) over 360 secs (1x60x60)
Check the correct answer and tell me whether my answers are even remotely correct :P
Dana:
--- Quote from: pglasg74 on May 26, 2010, 11:58:26 am ---
dana do u kno noor momani?
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noor momani no but i know reema and lynn momani. why?
Dana:
--- Quote from: pglasg74 on May 26, 2010, 11:56:58 am ---you guys can someone tell me the diff (in terms of brightness) between series connections and parallel? i kno its a stupid one but tyy :D
--- End quote ---
in parallel all lamps glow at the same brightness, in series they share the brightness.
8T:
--- Quote from: Dana on May 26, 2010, 12:01:06 pm ---Ahhh I hope ours is just as good! Congrats By the way :)
for a you draw them all in parallel and you put a switch near the battery. then 3 others on each line where the lamps are.
for b) P=IV so I= P/V so 100/200 is 0.5 A. I might be wrong though check and tell me
for b)ii) I(current)= Q(charge in coulombs)/t(time in secs) 1 min=60 secs.
Q=I x t so 0.5A x 60 is 30C
for c)i) you add the total power of the first 3 lamps minus the total power of the second three lamps
ii) you take the value that you got for for the reduction in power (c)i)) over 360 secs (1x60x60)
Check the correct answer and tell me whether my answers are even remotely correct :P
--- End quote ---
Dana, would you please post a diagram of the drawing for me.. i dnt quite get how we illustrate it ??
8T:
I have issues with diagram questions so there goes another one..
M/J 03 7 c i) Paper 3
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