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paper 1 physics HERE ONLY~!!!!!!!

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nid404:

--- Quote from: notty_me on June 09, 2009, 04:19:45 pm ---DOUBT!!!!!!!!!!!!
QUE.37 MAY08????????????
WY IS IT "C" NUT "D"???

--- End quote ---

k. i'll use values to explain

take the voltage from the source to be 20V
so current in the first circuit would be-20/200(combined resistance)=0.01
so voltage across each resistor would be 10V(0.01x100) since V=IR

In the second circuit current would be 20/190=0.105
so voltage across 90ohms would be=0.105x90=9.45
and voltage across 100ohms=0.105x100=10.05
so voltage across the higher resistor increases

hope u got that

noor92:
You guys can someone explain May/June 03 Q 17, does a small temp. rise mean high thermal capacity? The answer according to mark schemes is A.

thisishard:
may/june 2007 question 20 what should i do to answer these kind of questions?

Ghost Of Highbury:
ohh tks

cud this be the possible explanation
V = I*R
I = V/R
R decreases - I increases

when I increases  V increases too///

(i don't think so)

nid404:

--- Quote from: noor92 on June 09, 2009, 04:27:07 pm ---You guys can someone explain May/June 03 Q 17, does a small temp. rise mean high thermal capacity? The answer according to mark schemes is A.

--- End quote ---

yes thermal capacity=energy required to raise the temperature of the entire mass of substance by 1oC. So lesser the temp rise more the thermal capacity.

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