Qualification > Sciences
Physics Help HERE ONLY !!
Shogun:
hey astar, from where can i learn more laws of phyiscs, any law even the ones not in syllabus, cuz i would really luv to learn more laws...
MaNa:
--- Quote from: ManaH on May 27, 2009, 12:04:03 am ---
--- Quote from: astarmathsandphysics on May 27, 2009, 12:02:10 am ---
--- Quote from: ManaH on May 26, 2009, 11:56:03 pm ---can sme body explain MCQ
Paper 1 (2008may/june)
Q-37
n one more thing
Beta particals are elctions, n electrons are found in the OUTER ORBIT right
so in Q -38 (same year/session) the ans in A how?>
--- End quote ---
c.the voltage is in the ratio of the resistances
All radiation comes from the nuclues. A neutrom changes in to a proton: n>p++e-
--- End quote ---
but isnt it IR= V
so if R decreases V decreases too bcuz they r propotional:S
--- End quote ---
anyone ?? can answer?
Shogun:
wait lemme check
Shogun:
hey the answer for q37, is c
u see the job of the potential devider is tht it gives some amount of voltage to another part of the circuit (ie. the part with 100v potential devider on the second diagram) so what happened was tht both potential devider are 100v one of them becam 90 so as a result giving the missing 10v to the other potential devider with 100v making it 110v. this is the job of potential devider, it devides voltage to diffrernt amounts to differnt parts of the circuit. it has nothing got to do with r=vi cuz its not a resistor its a potenmtial devider.
the question states the job of the potential devider. and yea the units are in ohms but as VOLTAGE INCREASES THE RESISTANCE INCREASES.
and the answr for q38 is A cuz beta particle are elctorns as beta is negatively charged, and all rediations happens from nucleus
i hope this helped, any confusion difficulties or help needed plz do ask, and if they are correct according to the mark scheme (which is supposed to be) or if my explainaiton suits or is understandable plz do +rep me.
astarmathsandphysics:
Vout=R(OUT)/(R(OUT)+R) so the output voltage increases with the output resistance. The circuit voltage increases with the circuit resistance and the 2 voltages have the same proportion as the resistances.
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